Usually those types of pieces have an "eat your vegetables" vibe to them. While it may be good advice (and is, in the case of vegetables) people generally don't

Usually those types of pieces have an "eat your vegetables" vibe to them. While it may be good advice (and is, in the case of vegetables) people generally don't listen to music to be challenged. They're seeking familiarity, comfort, joy -- which are hard to find in "challenging" music, whether that's genres that they don't care for or more experimental music that defies conventions.