Injuries happen man. Just have to deal with them and move on. No reason to change his style.
Either you're an idiot or you have a medical degree from a prestigious university, which is it? I'm going with the former.
If a noted neurologist has cleared him then there might be something else the WWE doctor is seeing, who knows. Even if he gets clearance from a third doctor and his able to wrestle again, he should change up his style just as a protection for himself. I can't see the WWE letting him wrestle again if it happens again.
His health should be the most important thing to him. I'm sure the WWE would find him something to do that would enable him to stay around wrestling, just not actually doing it.