Yeah I'm a very casual player of Smash Bros. Never really wanted to go to tournament, I know my weight class. And personally I think I have more fun playing the game casually rather than having to worry about knowing how to DACUS, edgeguard, Wavedash, DI, SDI, L-cancelling, advanced Teching, etc.
All my friends we all play the game causally we all win and we all lose to each other at times but most of all we have fun playing it. Do I welcome competitive players? Sure. I am always looking to learn how to be better at Smash. And I really don't mind if I get my but kicked because Smash is still fun to play either way.
I know I wouldn't last long in a tournament and I'm okay with that. I like to stay "intermediate" at the game. I still have fun beating my friends (when they don't beat me). And I feel that if I did know how to play smash like a tourney player then it might make it less fun for me and my friends because then my friends wouldn't be challenging for me. I don't know about all of you but I don't care about the win or the loss I care about the challenge.
And that's probably what cements me a as a casual player.