That is what .5% of all drivers that need to drive on a curb to inspect a power line? I’m not sure what your point even is here?
But I bet they get a report of how often you manually drive and if you cross a specified threshold your rate increases.
Edit: Also why would you need to park on grass! Hop out of the car and it will park itself wherever in a nearby lot, or just drives around until you need it.
Your suggestion that all the cars should just e driving around waiting for you is fanciful, imagine something like a live music event with 100k people? Will there just be 100k cars circling the venue waiting for pick everyone up ?