There’s plenty of great singers out there, plenty of mostly or completely acoustic groups.

But you have to look for them, they’re not chart toppers, they haven’t been for more than a generation.

If you’re not looking for them and are just waiting for them to be spoon-fed to you, well of course you’re not going to get them. It’s not what sells and majors can polish the product in post, so that’s what they do, as with movies, they have no reason not to.

And with the rise of modern tech and social medias, they don’t need to sign up to majors to make their art and a living (though they’ll often associate with such for publishing e.g. Collier is self-produced and has the personal label Haganja but partners with Geffen - universal - and Decca).