Then that's an entirely different argument, don't you think?
You can have your own opinions on whether or not you miss the racial and gender stat maximums, but you can't say that the text of the 5e rulebook supports your conclusions when it does nothing of the sort.
FWIW, this is not horrible game design, unless you are equating "game design" with "rigid simulation." And boy howdy, if it's simulation that you're looking for, are you looking at the wrong game.
Agreed. D&D is, for example, a very horrible simulation when it comes to physical combat. Yet there are not many people who'd want weapon efficiency for specific armor or fighting style tables or attributes for weapon efficiency tables or penalties for attacks with less than average DEX or... simply have the fact addressed that long, two handed weapons are actually better weapons for smaller people with lower strength than "small daggers" or, worse, "elegant rapiers". There's a reason why non-warrior japanese women learned to use the Naginata or similar polearms :X
Plus... the average halfling IS weaker than the average half-orc. Because the half-orc gets a +2 STR and the halfling doesn't. The strength of the strongest halfling in the world (of which much less exist than "strongest half-orcs" or humans) can be as efficient in terms of how he uses his strength as the strongest half-orc. But that does make sense if you consider their energy consumption/day (= physical "power"), which is the same.
For the rest... do whatever you want but please, don't try to say that you're more based on "canon" than the other side. You pick your points to make your arguments and the others pick theirs. I guess we can all agree that D&D is not a good simulation and never wanted to be one (Okay, maybe Gary wanted that to some extend, but we cannot ask him anymore...). The point where you put your RL reality aside and in which aspects this does or doesn't matter to you is up to the individual. I, for one, don't play *fantasy* games to limit my imagination and thoughts by the dull, boring, limited world I live in. And I say this as a person who knows quite a bit about science, both natural and social.
PS: Your Tolkien, Conan, Dragonlance etc. stem from another time, really. As much as I like many of the fantasy classics, I can heartfully say I'm glad to see fiction which has evolved beyond that. Even such a "modern classic" like A song of Ice and Fire is at its core a story about oddball "heroes" and special flakes. All the "classic fantasy" guys have died along the way...