It's all about personal preference. People have different ways of having fun. If you just play casually and not-too-serious, you can't knock the high-competition people just because they have strict rules and tiers and shit.
At the same time, though, if you are a tourney player and you get your kicks by only playing with 5 characters and 5 stages and using no items and whatnot, you can't knock other people's playing style because they don't take the game as seriously as you do.
Bottom line is let people play the damn game however the hell they want to play it. Just don't try to force your opinion of what is and isn't fun on other people.