Bans should be used to take out champions that counter your planned team comp.

Not to ban OP champs because Riot fucked up.

If the game was in a good balance state, that could be possible. If you were to plan to pick a "Protect the Kog" comp, you should ban anti-kog champions. And the enemy, by analyzing those bans, should be able to ban Kog'Maw not because he's OP and rocking a 55% win rate but to mess your plan. But you can't anymore, because you'll leave Yi or Udyr open and unless they are really bad with that champ you've pretty much lost.

Because as the game is, the same 5 champions get banned with that one 6th ban that happens because the guy doesn't know what he's doing (Pls stop banning Illaoi).

Rito pls fix