So the opinion of someone is worthless if they have not played a wide enough variety of games? Please tell me I'm mistaken because I thought people couldn't get any more arrogant and condescending and that would prove me wrong. You can't just say "It's not an attack" and then in the same breath say "You have no clue what you're talking about and can't possibly have a valid opinion."
People play games they enjoy. I don't need to spend significant amount of time playing games I know I wouldn't enjoy just to prove my opinion "worthy".
Worthless? Maybe not, but it's probably not going to carry a lot of weight if they have no experience outside of one or two editions of a single game.
Like, imagine the following examples.
1: Anime
"Sword Art Online is one of the greatest fantasy anime shows ever made."
"Er...what makes you say that? Because it's pretty controversial, and plenty of anime is way more fantastical, both before and after it."
"Well Sword Art Online and .hack//SIGN are the only two anime I've ever watched."
"Wait so like...you've never seen Frieren? Or like Inu Yasha? Or Fullmetal Alchemist: Brotherhood? Hunter x Hunter? Anything from Studio Ghibli???"
"Nope."
2: Cuisine
"Traditional Cantonese sweet and sour pork is one of the greatest dishes ever to come out of China."
"Really? That's pretty basic, have you ever had
char kway teow or
char siu bao?"
"Never heard of 'em."
"Wait, really?"
"Nope. The only traditional Chinese dishes I've ever had are sweet and sour pork and lo mein, and sweet and sour pork is way better."
3: Novels
"
Harry Potter is the best 'young magic user' series ever written."
"Really? Even with all the controversy from Rowling?"
"I mean, I wish she wouldn't spout off about politics..."
"Oh, no I meant how it's super derivative of Ursula K. Le Guin's
Wizard of Earthsea books."
"Never heard of 'em."
"Wait, what?"
"
Harry Potter and
The Wheel of Time are the only fantasy series I've ever read. Well, I only read the first three WoT books, they got too boring to continue."
No one can tell the first speaker in any of these things are things they shouldn't like, because that would be telling them that their preferences are wrong. However, people absolutely can question how much merit, if any, there might be in these sweeping claims about the prominence of some particular thing amongst a field of things they don't actually know anything about.
When the one and only thing you know comes from a single source, out of many, many other sources, it's quite easy to lack context or nuance. Just as someone doing history research prefers to have as many sources (and preferably as many
primary sources) as possible, in order to avoid risk of any one source being distorted or biased, someone talking about "simulation" in gaming is....gonna really want to have played
at least a few different games that do sim, or at least to have
read them even without playing (though play is vastly preferable).
Pure preferences cannot be argued about.
De gustibus non disputandum est. But claims about the efficacy or prominence or functionality of something are not merely preference. They're a description of where that thing fits into the broader context. A person making such statements who doesn't actually know that broader context isn't saying very much.
And, unfortunately, it is very very often the case that people who play D&D have never played any other game. Hard to draw any contrast or speak to the effectiveness of D&D when you know nothing about the alternatives, even within a narrow range like "games that place special focus on sim".