Claiming that it's not sufficient doesn't make it not sufficient.
It's a matter of opinion, it's impossible to objectively decide whether a character should be banned in Brawl, as before Brawl came out it was never decided how "good" a character had to be before they were "too good".
Some people think the data is sufficient to ban MK, some don't, but a lot more do, at every level of play.
Well, if you see that there are holes in the information, and that the reasons they've provided weren't exactly as solid as you would want it to be. You would also believe that their decision was a little bit on the shaky side, and you tend to question the overall foundation of the entire conclusion.
Just because you read over 1000 pages doesn't make you any eligible to make a decision.
Just because you have data, and polls.. Still doesn't neccessarily mean you are outlining the problem.
Just because you feel incredibly strong towards a decision after all of the above.. Doesn't mean you are leaning towards the right decision.
Just because everyone else votes in favor. STILL doesn't neccessarily mean it was a correct decision when everything doesn't really add up, when there are still holes in their reasons, and some of the evidence they have isn't exactly telling the whole story of MK and his reigning over brawl.
See where I am getting at? They ''banned'' a character when they had shaky reasoning, and a very bias structure to go by.
Both parties hold valuable points, but only one party started it all.