The thing about having the "correct" taste in music is nobody can prove them wrong. They get to be all sniffy and superior with no real qualifications. And they get to sneer at others the way (I suspect) they were sneered at.
I'm with you.
I've run into people like that regarding music, coffee, dog breeds, cars -- if you can buy it, someone thinks they can buy it better. And if you get it without buying it, they have their noses so far up in the air they could drown in a heavy rain.
@BrazenlyLiberal it is mind-boggling. I have come across many people like this. An ostrich-like sense of superiority.