It can absolutely go outside the mainstream, it just doesn't by default. You can push it outside of its median.

Humanity rarely ventures out to the fringes on its own anyway. Only the committed freaks out there between the creation of experimental jazz and the mainstreaming of LLMs.

The more it changes, the more it stays the same.

As a sibling commenter said in fewer words: the models will still consume the fringe content and will be able to regurgitate it given the right prompt; suggesting experimental jazz or whatever other fringe art pursuit the committed freaks have an itch for.

I'll still slowly progress may way through John Zorn's catalogue, and occasionally re-invigorate my appreciation for HR Giger's bleak works, and keep listening (and subscribing) to the local community radio station, and seeking out uncomfortable movies, safe in the knowledge that likely I'll be watching, listening, and appreciating them all in solitude.

I do not think that "culture" can be forced, it must be slowly, almost imperceptibly, absorbed.

If you use it like a search engine it can find some obscure blogs that list some rare jazz though.