Ah, I didn’t do a good job explaining myself. Because that’s exactly the hurdle that Level 2 chargers present for charging businesses.
It’s not that charging businesses will use Level 2 chargers. They won’t - they’ll offer DC fast charging. It’s that their substitutes - workplaces and garages and other places - can and do offer them.
Exactly because Level 2 chargers are so limited, it’s economically feasible for businesses to offer use of them free of charge (no pun intended). Both to their employees (as a perk) and customers (as a relatively low cost inducement to patronize their business). Because the throughput is so slow, it can’t cost you that much to offer the free charging. And because it takes so much time to charge, you won’t attract as many free riders.
To use the gas analogy, you could never offer a free unlimited gas pump for employees to use in an office building parking lot. You’d lose your shirt. You’d end up paying for tankful after tankful every day just to your employees, and non-employees would likely try to get some, too. But if you had a gas pump that could only pump a quarter gallon per hour? Well, you could set that up in the parking lot and make it work. It’s cheap enough and time-consuming enough that you’d be out less than $10 per day, and few outsiders would be able to sneak in to fill-up without being observed.
There’s no actual analog to a Level 2 charger in the gasoline world, so no employer can offer a free “all you can fill” gas pump in their parking lot. But they do exist for EV’s, which is why free workplace charging (and customer charging sometimes) is a real thing. Which is one reason why the business of selling EV charges is not taking off at a pace to match the uptake of EV’s.