No, it's not. And most actors at some point write or direct their own movies. This idea that you can only do one thing and you have to have the machine behind you is archaic and retarded. Its ok to doubt people. If you would've told me Tyler Perry would have his own studio, Ida doubted you. If you told me 50 cent would go on to make a bunch of successful tv shows, Ida laughed. If you told me Michael b Jordan would be directing creed 3 and more....Ida laughed.
Nothing you said is comparable to Majors because none of the three men you mentioned had their career in jeopardy over domestic violence.
Creed 3 had a 75 million dollar budget and distribution from Warner Brothers. MBJ didn't fund the movie.
50's shows are on Starz. He already amassed a fortune off music so getting funding for TV shows was an easier transition. Majors doesn't have millions in the bank.
Tyler built his fortune off church going black women. He had a bankable audience, his own millions, and a distribution deal with Lions Gate.
Even if Majors raises a couple million who's distributing his movies? What networks and streaming services are supporting it? What's Majors' audience right now that he can bank on? You can't just make your own movie with no plan for it to be profitable.