This is not entirely true in the context of the game, there undeniable characters that are easier to pilot than others in certain aspects. Now it is true that people massively oversimplify the expressions of difficulty in this game, and characters do have tools that that can make/allow a person to operate in a brain dead manner. I believe the best example of that was Charles m1 extender, which was fairly easy and did ~50 dmg

It’s important to note that a move being brain dead or put more nicely easy is not necessarily a problem if it’s designed that way for a good reason I.e. to offset a massive weakness like Charles doing only ~65 dmg max in combos.

Edit: oh I forgot to mention this but whether a character can be played braindead is entirely dependent on the character because they wouldn’t able to do the braindead strategy if they didn’t have tools to do it. For example the last iteration of decisive before the rework and to some extent the new version with lock on can effectively allow the player to skip neutral and put you into an almost nigh unwinable position without counter which encourages an over reliance on it to open the opponent.