It's true that a word means what use the general public gives to it, and some terms are hard to define. But it's also true that if a word means something to me, nobody, not even the Royal Institute of Linguistics, is going to convince me that the word means something else.
I agree with the content of your post, but I feel differently about it. It's just a fact of life, so why care much about it? I mean, it still annoys me when someone uses a word the "wrong" way, and sometimes I get annoyed enough/have the energy to care and to say my opinion about it. Most of the time I don't care a lot, though. Especially when it comes to games, since it's my hobby and not very important in the end.
Some pet peeves of mine are when people confuse: they're and their; literally and metaphorically; it's, its, its'; or when they use semicolon instead of colon. Or when people talk about old debunked psychological myths like left-brained/right-brained, catharsis or learning styles (auditory/visual/practical).
I realized long ago, however, that I do the same mistakes. And I'm a besserwisser as well, which means I do mistakes and have trouble admitting it.
So yes, my mom's cooking and the food I grew up with tastes best!