But why use a character who's chances of winning with a certain amount of skill are the highest, and by far?
Take this example: Imagine Jigglypuff, as heavy as snake. Imagine her moves were twice as fast and powerful. Imagine that his crazed mess was put into the game. With such an unrealistic combination of "stats", including one of the best recoveries in the game, this character is not suitable to use. Everyone would use this mistake if they just "wanted to win", and avoid picking all other characters if they wanted to keep those chances high. Thus, a "Jigglypuff-less" brawl would be the most fair and only be fair. Similarly, Meta Knight has a unrealistic combination of stats that make him unbalanced in every way possible. Not as much as that Jigglypuff I mentioned earlier, but both have unrealistic advantages that make them unfair compared to all other characters in the game.
By the way, I also don't believe in "Tiers"...well, sort of. Rather, the accuracy of the tier list is not always flawless. It is true that you need to learn how to be good with each character, I've beaten a pro Snake user with Captain Falcon twice in a row (I probably got lucky, and my style of play was probably a weakness to his style of play somehow, but nonetheless I DID do it).