If wobbling was an actual problem then we'd see Ice Climbers getting top placements at every event. The reason it's not going to be banned is because there are plenty of perfectly good ways to play around it which is why we see so many players do well against Ice Climbers and place higher than them at tournaments.

In contrast, think of Brawl Meta Knight. Brawl MK was so broken that in order to succeed in Brawl you either had to pick up MK or play a character that could directly counter MK. That's why he was banned.

When the entire meta of a game circles around one thing because of how overpowered that thing is, that's when it should be banned. Wobbling is just a part of melee and adapting to it is a part of learning the game.