That reminds me of an idea that I sent in to Apple, via their bug reporter (you can submit suggestions).
I'm an Apple One subscriber. I only listen to Apple Music during my morning three-mile walk (45-50 minutes). The rest of the day, I'm working, and I don't listen to music, then.
I use their "Create A Station Based on This Song" feature, like Pandora. It generally works fairly well (I think Pandora works better, but they also limit skips -even for paid subscriptions).
I like to hear obscure, indie, music, from artists off the beaten path. I tend to immediately skip, when I get a song that is in my library, or that I've heard a lot (like the song used to create the station). I also tend to skip a lot, anyway, because a lot of undiscovered music is obscure for a reason.
One time, I was listening to relaxing, wordless, techno/trance, and a freaking Lady Gaga pop song plops in, like an airborne gift from a dyspeptic, incontinent, buzzard. The only possible relation to what I was listening to, was that one of her band members was maybe playing a sampler. She's a talented artist, and all that, but that was not what I wanted to hear. It was quite jarring.
Someone is selling eardrums. That was probably an AI hiccup.
In any case, my suggestion was to create "Undiscovered Music" stations, so you say "Play more songs like this one, but ones I've not heard before, and are definitely not in my library."
I would want to hear indie tracks, and songs from obscure artists. I listen to a lot of different types of music, and most of my tastes are heavily represented in the indie space. I often find it difficult to discover music that I'm not already familiar with.
I suspect that if Apple did it, they would sell out. They'd stuff these "Undiscovered Music" stations with commercial pablum; rendering the entire concept useless. They'd probably kill it, soon afterwards, because "Nobody uses this service."
The current push for "Bigger, Louder, MOAR!" is something that does not favor craftsmanship, Quality, or independence.