As someone that plays music professionally and who enjoyed Rock Band, I think that the issue is a lot of folks find satisfaction in matering skills and checking off boxes that other folks design for them.
Designing a satisfying skill progression takes a lot of work. I know what I will have to do if I, say, take up mandolin again seriously, and it's daunting- and worse, maybe it won't even lead to a satisfying or useful end... I will still do that at some point. I had the same feeling about cello or pedal steel guitar, and they all turned out okay.
At the same time I totally understand why following simple tutorials, running a preset course, climbing an established route, riding already-cleared bike trails, or playing a video game with few possible outcomes can be satisfying.
Designing a satisfying skill progression takes a lot of work. I know what I will have to do if I, say, take up mandolin again seriously, and it's daunting- and worse, maybe it won't even lead to a satisfying or useful end... I will still do that at some point. I had the same feeling about cello or pedal steel guitar, and they all turned out okay.
At the same time I totally understand why following simple tutorials, running a preset course, climbing an established route, riding already-cleared bike trails, or playing a video game with few possible outcomes can be satisfying.