Where are you from? I thought fuel stations in most Western countries were fully automated already. In Sweden there are loads with no people at all but even the ones with a store you just pay at the pump. You only go inside if you need to buy something else.
Very strange example to use and kind of invalidates your whole point.
[0] https://www.mentalfloss.com/article/74549/why-cant-you-pump-...
No need to get out of your car and deal with a dirty pump. You can also get out to go in the store while they fill your tank, or some smaller places you can buy stuff right from the attendant. Gas doesn't cost any extra because of it either. We used to have some of the cheapest gas in the country before a recent tax hike. Basically a free service, no tipping either.
One downside is that if it is busy you might have to wait, but the guys are usually pretty quick.
The cost can come from the margin for the gas station, not the consumer