On a high level the long term economics of such charging stations would seem highly questionable.
I think you are missing some of the opportunities here...
Its something that only those traveling larger distances need, that costs more than alternatives (homes charges) so anyone that can avoid them will.
For the most part, yes.
Compare to gas stations where everyone with a car needs them.
Don't compare to gas stations, because their use is different, and the required infrastructure is different.
Charging stations are never going to proliferate like gas stations.
Part of the point is that we
don't want or need them to. Mashing electric vehicles into the same model, patterns, and infrastructure as internal combustion is a flawed premise!
In communities with a lower density of long distance travel they probably make little to no economical sense.
So, you failed to ask where I found those level 3 charging stations.
Charging a car is not (currently) an in-and-out in five minutes operation. So, a freestanding establishment that is
just for charging is a problem for people - what are they going to do for that half hour or more? Just sit in their cars?
But also charging stations don't need attendants, and don't need huge underground tanks of fuel. The stations take only small amounts of space, so you can put them in any parking lot, with no significant loss of parking capacity.
I found them in the parking lots of shopping centers and malls: near restaurants, coffee shops, and stores. You put them in places where people can do something (and maybe spend a little money) while they wait!
An electric car infrastructure becomes ubiquitous enmeshed in the rest of your parking infrastructure.