While United didn't help their business with this event, I suspect the same for the Doctor. I would not want this guy doing surgery on me, or trust his snap judgement.
True.
I wouldn't trust this guy to be my landscaper, much less my surgeon. He seems like a hair-trigger lunatic. Could you imagine having to 'let him go' (fire) him for some reason? You would need police protection to get him out of his office.
Even if United relented and let him keep his seat, would he have been likely to have continued to disrupt the flight in the air? Would anyone want to take that risk?
Also, even if he made it to work the next morning, would he have been in a stable enough mental state to be able to perform his duties? I wouldn't want him to be my Doctor.