Gene's Vision was making a lot of money and running a show that provided him with creepy access to hit on female employees by convincing Lucy Ball that his idea of basing a show off of Forbidden Planet would pay out. Eventually it did, and the other thing worked out for him too.
FRAKES: <turns on a TV> Look at that!
RODENBERRY: What, you don't have a science fiction in the 21st century?
FRAKES: Sure we do. It looks a lot different. There are fifty major science fiction properties in my time. You can see Battlestar Galactica, Stargate SG-1, even Babylon 5 on a day like this.
RODENBERRY: Uh huh...
FRAKES: And you know, Gene...
RODENBERRY: Please ...don't tell me it's all thanks to me. I've heard enough about the great Gene Rodenberry. I don't know who writes your history books or where you get your information from, but you people got some pretty funny ideas about me. You all look at me as if I'm some kind of saint or visionary or something.
FRAKES: I don't think you're a saint, Gene, but you did have a vision. ...And now we're filming it.
RODENBERRY: You wanna know what my vision is? ...Dollar signs! Money! I didn't create this show to usher in a new era for humanity. You think I wanna spend the rest of my life writing space operas? I don't even like to science fiction! I watch westerns! I built this show so that I could retire to some tropical island filled with ...naked women.
That's Gene Rodenberry.
That's his vision. This other guy you keep talking about. This historical figure. I never met him. I can't imagine I ever will.
FRAKES: Someone once said 'Don't try to be a great man. Just be a man, and let history make it's own judgements'.
RODENBERRY: Rhetorical nonsense. Who said that?
FRAKES: You did, ten years from now, right before you got fired for going massively over budget on the first Star Trek movie. Live and learn, right?