Victim in critical condition
It’s not like the car can’t be controlled, if driving off was deemed the correct action, they could have gotten them to over-ride and drive the car off. Driving off is almost never the recommended action in these cases.
Lifting off is by far the safer choice.
Once it’s already parked on the leg, sure. But during the accident continuing on in the initial impact to go over the leg (hopefully with just the front tire. Would’ve been preferable. But also that’s a very weird edge case that i imagine there were no sensors for, and a human could’ve made the exact same mistake in trying to brake before hand but not quite making it and inadvertently parking on the victim instead.