no one is forcing you to use it.
I sank months worth of hours into Melee, to the point where I could 4 stock every AI opponent on lightning mode with no difficulty at all. I was not just good at the game but as good as anyone could be without facing real opponents.
I go online and what's the first thing I hear? Learn to wavedash you scrub.
So don't try and tell me its optional because, if you try to act like you're a better player without such mechanics, even so much as once, the competitive community will jump on you and never let up. You want respect from fellow smash players, you have to suck it up and learn to play through the pain.
The level of difficulty just makes it more competitive, which is a good thing for competitive play.
This is a misconception. Difficulty of correct implementation and the thought that goes into knowing when that is are what make a mechanic good for the competitive scene, not input difficulty. L-cancelling was not good for the competitive scene, only the low landing lag that resulted was.