You're overthinking it just like everyone else with this explanation.This is cap. It simplifies MJ. MJ wrote and produced some of his biggest hits and did for others as well. He also had his hands in everything creatively from his music videos to his choreography. To say he's just this machine based artist is ABSOLUTELY FALSE. I'm tired of nikkas pushing this narrative to big up Prince. Who doesn't need that. The MJ line doesn't make sense. Period. In any capacity. MJ did alot of his songs AT HOME first.
I agree with you as far Mike having his hands in everything. But the line is the line. Prince lived longer than Mike. That's it. That line really needs no deeper analysis.