The thing is, without the CD the same tank/healers can also just say “just kick me, I can find a new group instanteously anyway” or “I don’t like this dungeon, pls kick so I can requeue” etc etc.
This iteration is the least worst of many versions.
If you got a better idea, please suggest it through the ingame box (not removing the debuff, you may send in that opinion but they won’t).