It’s not sufficient to say, “I don’t like that music.”
You have to have a reasoning. Or so I tell my students, and the thinking behind that is solid. Only when you can justify your opinion do you really plumb the depths of what you value in music. It’s through this reasoning that you learn what you value.
I work really hard to think through my own justifications. Because while I respect all music, I don’t love all music equally. When someone asks me why I’m not partial to Barbershop, I want to be able to explain why.
This clear reasoning shouldn’t ever be meant as a criticism, though. My musical values are different than yours. Not better or worse, just different. If Barbershop speaks to your musical values, then I think you should throw yourself into it. Or death metal, or vocal jazz, or early music, or A432 tuning. It only matters that you can clarify your love and I can clarify mine.
And then peacefully coexist.