Even just for travelers though. If you’re within 30 minutes of a highway exit and there area isn’t well covered by other chargers it seems like it would be a good investment.
If it were me I’d even try to sell them washer fluid and other road supplies.
I think being able to charge at home is almost a requirement but definitely not necessary in some places. I charge at home maybe twice a month, and there are dozens of chargers within a few minute walk of where I live. Many retail areas have chargers too, so its easy to get a few kwh of charge on a short trip to get groceries or something.
I think there are also a significant number of EV owners who almost exclusively use public DC fast charging. If there are enough fast chargers around, you can treat an EV similarly to an ICE car - drive it til its mostly empty then fill it up.
Having an EV requires charging at home. People that can't charge at home don't buy an EV. People that would charge in a parking lot don't have an EV.
Public charging has really stagnated in the last 5 years.