A couple things come to mind, here:
1. I'm questioning the independence of these doctors. If, after seeing how Tua literally could not walk without assistance (and let's be honest - no one on earth believes this was a back issue), and "independent" doctor says, "yup! He's good!" then I would question that doctor's true intentions/directives.
2. I get that the teams SHOULD be able to take the word of a doctor and move forward accordingly. But, again, we all saw what they saw. Tua was punch drunk. If we can't trust a so called independent doctor to make the best decision on behalf of the player, I think we should be able to trust the coaching staffs of the teams.
This is literally life and death stuff. For a game??!?