The entire process is very much not automated

Music in general isn’t (and never will be), but the generation of musak that’s good enough for most commercial purposes very nearly is.

Music is sort of its own thing. Individual musicians can put their music out there and gain a following. Visual art not so much. Not many people care about “great artists”. Most visual artists make a living making art assets of no particular individual expression and are at a lot of risk imo. I’m not sure that I believe most musicians make a living composing music.

Also the creation of musak can be done by much more wider amount of people and requires less studying. Like driver I we requires less studying than driving a black cab without GPS.