These numbers seem skewed to me. I think you're quoting prices for gas pumps with just the pump, not any storage infrastructure like underground tanks, stores, employees. Then you're quoting the cost high speed chargers without any kind of electrical infrastructure to support them, which would be expensive, but more analogous to including the cost of all the other infrastructure for gas stations as well.
The infrastructure for high speed chargers is a lot of metal, which unlike a store, does not contribute extra money in addition to the pump.
Now you have a reason for someone to sit and spend money, and likely enough as EVs hit critical mass to justify costs. There are things to work out on speed of food vs charging times, potentially a queue and valet setup - but napkin maths it seems viable.
Employees are needed because most places require gas stations to be manned. Unless you're talking Bucee's they're not making much from selling a few drinks, they're just making marginal use of the building.