As a long time WoW player, orcish history has been tempered in their attempts to expand upon it. Some tribes are more violent than others, less conquerors, more shamans, and much of their collective violence was written to be at the behest of the Burning Legion (demon hordes). Also, the main planet the game takes place on is Azeroth. Discounting the Iron Horde in alternate Draenor, the orcish invasions (both of them) were fronts for the Burning Legion because the Legion's target has always been Azeroth.
Which is probably fairly true of D&D as well. "Monstrous races" have become decidedly less "monstrous" and more "natural races" as the game as grown over the decades.
They were never all that particularly monstrous except by label.
They were just "humans, except it is totally fine to murder them all down to the last living being because they aren't 'human' humans and all universally 2-dimensional evil and stupid and hopeless who literally popped into existence simply because they were rolled on the encounter table and have no story before or after"
The fact that you think there has been anything lost I dare say speaks you a certain psychopathic tendency that you feel you are no longer able to fully engage in with total social support in doing so.
More to the fact well... you are wrong on a very deep level. The whole concept of Orcs and Goblins in D&D were totally ripped right off from Tolkien. The term "orc" had never previously been applied to any concept of a monstrous humanoid previously... and goblins? They were like malicious leprechauns. The idea that they were something humans would kill using swords, much more so that they were very weak and easily defeated peoples that would be killed by swords by the dozens by any decently trained warrior.... that's all Tolkien.
And you know what? One of the aspects Tolkien expressed never being happy about his seminal work was that he had this whole peoples that just got painted with this broad brush of being the "evil ones" like it was just fundamentally genetically true and nothing could be done about it. It had implications that he wasn't terribly comfortable with. Had he decided to continue his Middle Earth stories, it is almost a certainty that he would have had these stock evil races becoming more human.
In fact, approaching the whole thing with any level of maturity, any level of intellectual honesty whatsoever kind of forces you to do so.
The idea that you have these humans who are just slightly warped in dimensions who are all righteous and perfect and good and universally trustworthy and deserving of endless worship and praise on one side... then you have these other humans on this other side who have slightly more beastial features and unusual skin colors and they are all wicked and thoroughly flawed and universally aggressively violent and deserving of complete derision and extermination on the other side... its clearly the mentality of an angry child.
On one side, if the former group is all so flawless and incapable of doing anything that would make them even slightly disagree at any point, then why haven't they just bred together and blended into a single race of people that might just be a slightly more broad version of humanity? Surely if there are issues that are keeping these peoples fairly divided into neat little separately living species communities, there have to be some deep flaws to them. Not every individual, not even most individuals, can be painted with this broad benevolent brush. But, at the same time, let us say that each group can still hold themselves up as being generally moral, those flaws cannot be overwhelming. Still, given that they are meant to be exaggerations of humanity, each in their own way, this can be used as a method for really giving their society some uniqueness and depth. They have their merits, but also their own prejudices and vices and social issues that also define them.
And when you get to those "evil" humanoids? Well, it doesn't require a very intelligent person to realize a society where every single last individual acted completely selfishly, maliciously, destructively and violently towards everyone all the time without fail would just not work at all. In such a society children would be incapable of surviving to adulthood... or, at least, would do so very rarely meaning that such a people would never be fielding armies large enough to threaten civilized settlements that have use of late middle ages technology, much less magic. And even then, it is almost certain that any such group would just dissolve itself-- as every individual would benefit more on their own than they would continuing to associate with a society where they must be paranoid at all times and can expect no one to keep their word or fulfill their duties or generally function at any point unless directly personally and immediately benefiting from their action. The only way you could have such a society is if it was tightly controlling its land and borders and could police its population-- something that doesn't remotely describe the orcs and goblins in virtually any D&D setting. Instead, we only see them as these small scattered groups that live within the lands that are entirely dominated by other peoples with no explanation as to how they could possibly have gotten there and formed a community without drawing notice and military action to drive them out.
But, then, we can see in the real world plenty of societies both modern and historical where based on their actions towards those who were not part of the society, we would describe them as evil. In fact, we can look at historical societies that people would be very hesitant to label as "evil", but an examination of their actions towards outsiders... or even to how they treat those within their society who fail to meet the standards, and one would be hard pressed to deny that the 'evil' label might just apply (with maybe the excuse 'oh, those were different times and this is perfectly moral behavior in their context'). So the idea would be less about every individual being evil all the time and more about how the society itself acts against outsiders, particularly the society that the PCs are likely to arise from.... although, if the PCs are treating these other humanoids in just as brutal of a manner, then one should admit that these 'good' and 'evil' labels have no meaning and are thoroughly arbitrary and in and of itself there is a story to tell there. The kind of story that is worth pondering and should make one consider how we act towards others in the real world and why we do so.
But the fun thing about orcs and goblins? They are somehow both very well known while, amazingly, at the same time being almost entirely undefined.
In various settings, dwarfs are hardly any different. Always their appearance, their mannerisms, their general society and belief... you barely ever see variation of any sort there. Elves do get more variation, but usually it only comes in some off-shoot subrace of elves with some modifier attached to them. But generally, if one is talking vanilla elves then everyone knows what they look like, everyone has a pretty good grasp on their mannerisms and belief systems and abilities....
But Orcs and Goblins? From setting to setting, edition to edition, even the basics of their appearances aren't very consistent... Orcs are bulky and Goblins are small (well, vanilla goblins), but beyond that? What exactly do they believe? What are their common mannerisms? If one spends an hour each playing Total War: WarHammer, World of WarCraft and Shadow of War... and you tell them that each of those things is an 'Orc', I think one would be left quite confused. But all three interpretations are quite a lot of fun because the race was enough of a blank slate that there was a lot to fill in there to make them interesting.
You can just about give any culture you want to your Orcs and your Goblins, you can pull from just about any human influence, you can give them whatever merits and flaws you like... so long as the former is still brawny kind of dim people and the later is small and sneaky people, people will just accept it. Any setting can really just own them and really shape them into something fun.
D&D's single largest failing is that instead of trying to capitalize on these familiar fantasy races that are found in other media, are already popular and people already have ideas about, they continue to try to come up with half-baked
ideas and pushing them really hard-- all hoping that they will somehow hit on the great new fantasy race that all other worlds will want to copy, but they will hold the IP and patent on.
