You guys basically just have to troll and make strawman arguments in order to have a semblance of a leg to stand on with this tearing down of Smash's competitiveness.
In a competitive setting in Smash Ultimate, a person like you who's going "
This isn't a fighting game
." isn't going to do anything to someone who's skilled in the game just like in any other competitive arena. If the game truly had no skill barrier for competitive play, you'd see newbies and those like you randomly winning against high level players. Heck, there wouldn't be any "high levels" to speak of.
There's really no need to be disingenuous about it honestly. It's a ignorant hot take espoused online by people that 10 times out of 10 are ignorant to Smash and really aren't good at it.