And yet they're not?
Some biopics are very negative. They've made films about Idi Amin, Genghis Khan and Adolf Hitler...
Again - you have to divorce the film from the subject. You can get a good quality film about a bad guy, and vice-versa.
Some films are about the character/personality, and don't even mention the career of their subject.
It would be a really crappy movie if it just lists what Grammy awards Michael won, etc.
Exactly. A biopic is NOT a promotional piece. Nobody knows Hot Street. It would be extremely out of place, jarring, and would take up runtime that could be used for a familiar hit.
Look at how Moonwalker is looked back on these days.