Nothing that anyone does at a tournament stops you from enjoying a game with your friends. People who attend tournaments don't typically do it for the money, you know? It's certainly an added benefit, but I'd be willing to guess that a vast majority of the smash community, including the competitive community absolutely love that game. I don't see how that can be a bad thing, honestly.
I play KOF for fun, I also take it quite seriously. When I play SSB, I try to do the best I can, and I have fun regardless. I don't see that as ruining a game. I see that as playing it to my potential. I don't sign up for tourneys for smash, but I don't look down on the people who do.