They make money off of X% of N travelers per day stopping to buy a coffee, cigarettes etc. If you require a substantial amount of space to be taken by travelers who sit there charging for 30 minutes, you're reducing peak travelers (eg during the morning and evening commutes) and significantly reducing total traffic. Claiming that they're all going to come in for a slurpee and this will happen to work out neutral or positive for the gas station is pure handwaving.

Indeed, gas stations would probably love if all cars were electric. When you stop to charge, you know that you will be stopping for at least 15 minutes, so why not get a cup of coffee and a snack while waiting?

If we're lucky, gas stations might turn into alcohol-free third places where people watch sports, have a meal and hang out while waiting for their car to charge.

Driving ranges are generally high enough that driving from 100 to 0% charge means you should take a legally mandated break. So why not embrace that?