I don't understand why every gas station doesn't have at least a couple chargers. This is easy money for them - they don't make much on selling actual gasoline,

I don't understand why every gas station doesn't have at least a couple chargers. This is easy money for them - they don't make much on selling actual gasoline, and people stopping for extended wait times to charge their EVs are far more likely to stop inside, which is where stations make most of their money. Seems like a no-brainer.