The old way was to say: you're doing it wrong!
The new way: you're doing it different; could I enjoy that? Even if I can't, here's something you might like.
I guess I don't have such an aversion to the terms so much as how they tend to be used...
IE this can't be in the game because it's too X, or Y, and isn't Z enough.
Especially when it inevitably devolves into why X Y or Z rule or element makes something not D&D or not Roleplaying...
No, I don't enjoy EVERYTHING out there... I guess I just don't seek to avoid something because someone out there decided they wanted to label it one way or the other. (Hell half the time people can't even seem to agree on what the labels actually mean or whether or not one thing fits into said label or not!)
I like The Cure... But I've seen them thrown into genres such as: Rock, Pop, 80s music, Synth Pop, Goth, Alternative...
I guess if I was the type that reacted to labels and I didn't like Goth Music I never would have discovered The Cure?
Usually when someone says they like Genre X of music I'll say: "Like what bands?"
I think it's even more dangerous though when it's used as a measuring tool for whats being created... Like a guy trying to write a script that would be considered action and only action. He spends so much time trying to fit every part of his story into the action genre, that it ends up being a watered down version of something that might have been incredible if he'd just not worried so much about not letting that comedy slip in there...
Hey if they work for you, more power to you... Maybe I'm just in a bad mood? It just seems like I've only ever see them used to draw a dividing line. AKA I only play X not your Y... instead of hey, I play X in this way, let me suggest it as something fun... Maybe that's why I feel they don't offer a benefit? Because rather then solve the issues you say they were made for, I've only really ever seen them used to create even more reasosn someone is "doing it wrong?"
Maybe I'm also more of a reactionary person as opposed to a preventative person if that makes sense? AKA if someone says they play RPGs, and invite me to play, I don't really start listing a cadre of labels I don't play. I just play... If it ends up not being my style, I stop playing.
If someone has a new idea for the game, I listen to it. I don't ask them to tell me what niche the idea fits into and stop them before they even start.