I'm sure you've met someone who likes “everything but rap and country,” someone who “doesn’t GET classical music.” I'm also sure you don't get the sense they’ve spent hours trawling crates of rap and country and classical music, listening to a suitable sample size and making analytical assessments. Hell nope. They're speaking in shorthand. They're saying they’re the kind of person who likes everything but rap and country. The kind of person who doesn’t understand classical music.
For whatever reason, when we talk about the genres of music we listen to, we're talking more about our cultural identities than our aesthetic choices. We're wearing our team’s colors. We're promoting our personal brand. We're identifying our ~scene~
And like, why?
Honestly, I can think of all kinds of reasons, but none of them are the least bit satisfying: Everything sells better when you can segment the market; Stakeholders tend to approve what has performed well in the past; Outdated, wildly xenophobic ideas about what counts as high- vs. low-brow art still manage to permeate our popular culture today. I've even gone googling for reasons genre might be important, and results overwhelmingly reference "engaging target audiences" in "today's crowded marketplace." Barf emoji.
I invite you to question your preferences, is all. Get curious: Why do you like what you like? Why aren't you the kind of person who listens to, I dunno, deathcore, or integral serialism, or chip prog? What might that kind of person like about it?
I mean, y'know what they say about curiosity and its effects on the lives of cats.
But why else would they get nine of em?