I actively avoid running low on fuel in New Jersey (compulsory full-service stations). I don't mind getting out of my car to get gas; the station attendant is doing nothing of value for me. I'm neither done faster not is the fuel in some way better than if I filled the car myself.

In contrast, I do see the value in having a battery exchange (it's something they can do better for me than I could do myself). In that case, not getting out of the car is still essentialy a non-factor for me, but it does end up being a tiny perk.