Aaron Sorkin wrote the screen play. His last movie was about a CEO A*Hole of a multi-billion tech company that was a success.
But it was the _first_ movie about the subject, not the _fifth_in_four_years_ (plus TV episodes, thick books, and at this rate probably a Broadway musical sideshow as well).
Most people don’t see movies just because of who directed it.
If they'd asked people if they wanted to see a Steve Jobs biopic most people might say that they wouldn't bother or that they've already seen it. But they don't ask most people.