I am not a fan of EVs, but your post is partially wrong. The batteries have to be at room temperature to accept the fastest charge rate. It doesn't matter if they are inside or outdoors when the battery is at a low temp.
So either a room has to be heated that the car can be in to charge properly, or the battery has to use some power to keep itself warm. Either way we’re talking additional power requirements. BTW, if charging takes even just a half hour then people are going to want a place to chill. Every charging station should have a Starbucks or similar where both the people and their cars can enter.