That's not how liability works, not either morally or (IANAL) legally.

That’s fine, you can leave the car, but you’ve already lost your foot. Why do you find this confusing?

Because you didn't find out it was a bear trap until after you stepped on it?

Ah, yes. The old story of the one-footed man who didn't take the car.

Well I would feel slightly irate if I had to find out about the bear trap before I decide I don’t want the car.

You discover it’s a bear trap not before you try to pull out from the parking lot.