Because there are so many altcoins who's founders are still around, and quite a few of them are hellbent on making their coin worse, not better.
Did you mean Luna, by any chance? Well, I am kidding. Yeah, I agree with you. As long as founders and developers have control over their coin, they can make it better and worse. In most cases, It will be worse because everyone wants to do business in this market. Bitcoin is different in this case. No one can control it. At least, not a person. Am I going off-topic?