What good is the safety driver doing in the passenger seat? Even the die hard Tesla FSD fans will admit that it isn't uncommon to have a serious disengagement. I give this less than a month before they pull the plug.
In the first instance they're asking to see the passenger's app to verify identity. Seems like a necessary precaution considering what happened to the Waymo vehicles recently.
Presumably if there were an incident they would be trying to remedy any situation.
The same as a driving instructor. He has a brake pedal, and he can pick up the steering wheel if necessary.