For reference, I am not claiming that anything WILL be found. If the situation doesn't change and the community sentiment is correct, I am PRO-BANNING.
I only claim that something MAY be found, and he cannot be banned until we are sure that is not the case.
We can never, ever ban
anything by your logic. Not even if it was a character of Akuma level brokeness. I'm sorry, but that is just bad reasoning.
All I want you to demonstrate is that there is a current known technique that only works against MK, that shows he has
something that makes a hope for an effective tactic vs. only him a realistic thing to think can exist. Against this possibility we have a series of tactics that work against him and others as well, and a number that don't work against him, and we can look at why they don't work and realize that MK is just a fairly standard character as far as his escapes from techniques go. Therefore it is unlikely anything specifically against him will ever be located, because he doesn't have unique stun properties the way the characters that do have specific vulnerabilities do (Like Ness/Lucas with the infinites against them from certain characters, the people who Dedede infinites, etc.), a large size that allows people to do followup hits against him easily after performing an initial move, or a heavy weight that causes him to fall back down rapidly enough to be combo'ed even at lower percents when other characters can't be. There's no property he has that would enable this, and frankly I don't believe better proof of it being impossible (Or extremely unlikely, as "impossible" is rather final) can be realistically demonstrated.
You have nothing even showing that this can be possible, all you're doing is stating your opinion that it could be found and claiming that you not only don't need proof but that I must somehow prove it can't be done. Well, I've listed reasons why it's not going to be found, why don't you tell me why they're wrong based on the mechanics of the game.
Summary for you:
He's small so combos needing large size to connect can't be found uniquely against him.
He's light so combos requiring him to fall back into them can't be found specifically against him. (And being light can be simulated for most combo purposes on heavier opponents by adding damage to them, so it's not a unique combo-creating attribute)
He doesn't have unusual length animations after being struck or breaking out of a grab, so combos that rely on the character doing something odd can't be found against him.
He does have some extremely fast attacks that can provide invulnerability frames, further providing him ways to break out of combos that would normally catch others.
Tell me which of these is incorrect. Tell me what I'm missing that leads you to claim something can be found specifically against him. Tell me why it's somehow okay for you to make things up, but anyone who disagrees with your statements of what will happen must have proof. And tell me what is lacking that can possibly be proven that would
ever convince you a character couldn't have something against them and thus needed banning.