I'm not saying it invalidates it, I'm just saying that even though he created Star trek, he wasn't good for it. Imagine if DC Fontana and David Gerrold were able to work on the show without Gene and his lawyer always butting in and telling them what to do and what not to do. Michael Piller always described this situation as "Gene's Box", where as long as you work under Gene, you have to abide by his rules of Star Trek. They basically amounted to "Humanity is perfect and there is no conflict. Now go create drama."
I see this criticism leveled a lot, and while it's very valid, what Piller did say is that he had to create drama outside
of the main cast, which he and the writers did. While it's unconventional writing to say the least, it still worked.