if you have to drive 15 minutes there and 15 minutes back, that's not faster than a fast-charge top-up at the fast charge point down the street, though. There's a critical density below which if you have a charge point nearby the nuisance of "going out for gas" and not being able to do anything else during that time isn't worth it compared to plugging in your car, and then just walking away for an hour. Especially if it's just down the road and you can just walk home, then walk back an hour later to pick up your car.

Because that's what's really in competition: you have to be with your car the entire drive to and from the gas station, plus the few minutes it takes to fill up and pay, whereas you don't have to be with your car when you're plugging it in to charge: that time is now yours.