You can't talk about rules if you have no idea what you're talking about. Playing the game is different from theoriecrafting.
While it's true that planking is a problem, people wanted MK banned before DMG came up with the invincible stuff. And that's just... bs, but whatever.
In my opinion MK doesn't dominate too much to be banned. Dojo had no chance against Ally and even Bassem beat him. Okay, he got 2nd and that's really good, although Razer forfeited to let him have a chance to fight against Ally. Razer could've beat Dojo and he'd be in 5th place. And he's considered to be top 5 MK by like everyone and some people even say he's the 2nd best MK... the top 3 of the tourney would be non MKs. MK isn't dominating as everyone says. It just seems like that, because over time he obviously has more wins than other chars.
Pound 4 is it's own story. DEHF would've probably got really high if he didn't SD like he did. And then everything would've looked different. And you can't just say "ya nonMK mainers lose, because their chars have bad MUs and MK has none so something like that won't happen to them". I mean it's somewhat true, but who cares... it's not like you can't beat those other chars, that beat your char, only with MK. Okay, some non MKs might need to play 2 chars, but that's why they aren't as high on the tier list. Diddy and Snake can definitely hold their own too.
Most other good nonMK mainers didn't even come to the tourney. So OF COURSE all those good MKs will get the top spots, because most other people just aren't as good. Where was SK92? Where was Anther and other good Pikas? Where was NickRiddle? Where were Fiction, DMG, Bassem, ...? Where was Gnes? Ultimate Razer? MikeHaze?
Also, many non MKs had to play before they faced an MK so they kicked eachother out...
If people use MK, then they use him, and if they use other characters then they use other characters. Many people pick up MK, because everyone says he's so ****ing broken and easy etc etc. Of course people pick him, because he's the best character, but he isn't that much better than everyone else. If everyone was meatriding Snake or someone else maybe people would pick those characters and now the same thing happens for them. OMGZ they're too dominating we have to ban them, because everyone uses them.......
Just because the best players choose to play the best character doesn't mean he needs to be banned.
If he gets banned then they might switch to the next best one, which may or may not be Snake. And then everyone plays Snake, Dedede, Falco, ICs, Diddy, Wario, ... instead of MK, Snake, Diddy, Falco, ICs, Wario, ...
Maybe people just think he's so good so they use that char.
What if some good players liked to play Marth, because he seems to be easy to use, good, but not the best, and is very popular because of his playstyle.
Now many players would play Marth, because he's cool and blabla... most of the best players will play him, but there is one really good MK that is beating them. MK is the better character, but people still play Marth, because he is much easier to use and people just like him more. Many people think he's the best character, because he has such good placings.
Results would be like:
1 MK
2 Marth
3 Marth
4 Marth
5 other
5 Marth
7 MK
7 other/whatever
You people would probably ban Marth (in this example) too, even though he can be beaten and it's just the players that are so good. Maybe Marth isn't even the best Char and people just think that which means many people will use him.... Other chars might take more skill to master, and just because he's so easy to use and everyone is too lazy doesn't mean he needs to go away.