I think it's fair to give (a lot of) credit for the Netscape work, but people like Andreessen at some point have so much money and clout that in particular in the VC field they can literally make reality as they wish and turn everything into a successful exit or just absorb an almost infinite amount of failures that nobody else would get away with.

I put a lot more weight on what people do when they had no name than what they did in this industry with its personality cults once they got the ball rolling.