This is a terrible idea.
Discussion
Car is requiring some permissions, please review them
- brake
You might not like it, but this is what peak self sovereignty looks like.

There are many benefits to such an architecture. Imagine in the future you could have a self driving app on your phone that reads the inputs from your car relay, (or maybe you publish to their relay on their servers for faster compute speed) as well as your phones camera feed pointed at the road, it feeds those into a DVM (paying per minute of driving in zaps), and returns steering/accel/brake inputs signed by the provider. You would sign an event telling the car to trust that npub as well, so that your car doesn't listen to any input coming from the CIA trying to drive you off a bridge because you tried to withdraw more than $25 from an ATM in a single day.