OK, so one Uber driver has been molested, and it's probably not the first, but:
1. even if he did not have a dash cam, finding the guy would have been easy: he booked a ride with the app, linked to it's bank account, which is not the case for a regular taxi driver.
2. Even with the partition (it's probably not bulletproofed, neither the windows of the car) any taxi driver knows he can meet intoxicated / violent people, this is also not specific to Uber (it's probably less current with Uber since point 1.)
3. The altercation is 15s in length, what could have done a dispatcher from his booth 15km away?
Honestly this looks like some poor news story including a huge name in it, but nothing quite revealing in it.