Sounds like it was dark at the time of incident. The victim was so drunk, he could not recognize the Uber car. Uber sends you description of the car & license number and driver's name and photo.
If a stranger is banging on your expensive car, should you just ignore it and quietly drive away? That would be cowardly. No one has the right to bang on your car unprovoked.
All that said, if I got out of the car and punched the offender, and if he falls to the ground and is unresponsive, I would call for help. The coach is guilty of hit and run at the least.
"...that would be cowardly..."