It is a widely known fact that as soon as one learns to wavedash, the game instantly ceases to be fun. Nobody who plays in tourneys actually enjoys the game.
I had more or less quit playing melee a few years ago without even knowing of the existance of wavedashing or any other advanced techniques. When I learned about them, I got back into the game, learned the tricks, and I know play it daily. These advanced tactics are an additional challenge! Challenges are what make games fun. I have a lot more fun with the game now that my brother and I have learned these advanced techniques, primarily because it makes the game so much faster and more exciting.
If you don't like wavedashing, don't do it. If you don't like playing against competetive-level players, don't do it. Nobody's faulting you for it. But seriously, you gotta be a real asshole to want these taken out just to piss off the people who enjoy them.
EDIT: I think what would be really cool would be if there was an option to turn advanced techniques such as wavedashing on and off. That way people who think it somehow ruins the game can completely deactivate it, and those of us who still want to be able to do it will still be able to do it.