Idk man, you do have to know subgenres on some level even if it's just vibes based. I have to know enough to communicate that I like Trance and Progressive but fucking hate Drums and Bass(liquid is okay though I guess) at least.
I’m just waiting for the kids to consider the metal music I listened to as a teenager “classic rock” because it only has regular guttural screams that aren’t run through a bit crusher and an octaver.
It's easy to be a Touhou fan. All music is "Touhou" genre by definition.
To be serious, the regular genre description is still applied, but since character/stage themes are used as the basis, it imprints the character's/stage's emotions, the track's structure, and possibly more things that I currently can't properly desrcibe. So it can make sense to group, say, all Keiki tracks together, because the emotions that exist in Idolatrize World are preserved in the arrangements.