I don't think that behavior is all to common. I see people listening to a very wide range of artists and almost never reach for stuff outside of it around here.
My wife uses them to shuffle singles by specific artists (she’s more into pop music).
I’d wager if my wife and I both coincidentally follow the same pattern despite doing so for different reasons, that it’s then likely a more common pattern than first assumed. Please also bare in mind that I’m not suggesting our use cases are how the majority of people consume music, but I’d be surprised if it was small enough to be a rounding error.