Stoic Joker, it's not 3 seconds of the operation
In order to understand it, you just need to let your fantasy free
Imagine, which would be the best way to refuel your car?
To me, I would just go to the station, and without leaving my car, an automatic robotic arm will insert the nozzle in the tank, fill it, and I just leave!
Now what do I do? I arrive at the station and wait in the quete, I start/stop the car few times, until I reach the filling point, I open the door and get out in the cold, put the nozzle, fill the tank, leave my car open and unsecure to go to the kiosk of the station, wait in the queue, interact with the cashier, search for money in my pocket and wait for change given which can be made a mistake or put out the card from my squeezed wallet, insert it to the slot, wait to connect, put my card back again, and then go back to my car, fasten my seatbelt, etc
I really doubt it's a 3 seconds improvement
It's not about convenience only, it's about both speed and security