This honestly sounds like a whole lot of nothing. How can a car chase be "near catastrophic" with no actual collisions? 2 hours? In Manhattan? Why didn't their car just slow down or stop altogether, pull over and call the police?
Paparazzi really need to stop hounding people, but until there are laws against it, it's gonna keep happening. There never needs to be a car CHASE though. Drivers need to stop trying to get away from these people. Have a better protocol. All they needed to do was have blackout windows and drive slowly and nothing crazy will happen.
I feel like Harry and Megan don't really want to be left alone. Because I hear about them WAY more than I want to.
There is a saying in Hollywood. "If you don't want to be found by the Paparazzi, you won't be." It is possible to have privacy and stay out of the public eye. Plenty of celebrities do it successfully.