This is actually an interesting question to me.
I agree that music at Mass ought to be a particular sort.
However, I can’t quite understand and/or explain why.
The thing is that I recognize that the music at Mass is for the purpose of the worship of God. It is vertical, rather than horizontal - directed towards God, rather than towards the congregation. However, I also recognize that God does not have an aesthetic style. He doesn’t like one kind of music over another. (I suppose Christ might, in His humanity, but what that would even be nobody would know

.) So I know the music ought to be a certain thing because of the vertical dimension of it, but I also know that God the sort of music it is doesn’t matter to God - not directly anyways. In some way, the importance of the music has to do with how it relates to the congregation, even thogh that actually
doesn’t matter at all. What matters is
something about how the music helps the people to relate to God, or
something, but I can’t explain it.
I brought this up on Fr. Z’s blog, but I didn’t really get any answers other than people telling me where they thought I was modernist. I’m hoping I get more help here
And I certainly think that this question will help contribute to the OP’s question. I think it’s simply a more specific way of asking the question.
Peace and God bless