You need Superchargers when you are on the road. I would not own an EV if I couldn't charge at home.Of course it does when you live at Tesla ground zero. Not so much in much of the rest of the universe. For instance there are 3 Superchargers shown in my area with a population of over 200,000. Other chargers as well but you said Superchargers.
But you have a point; Supercharger availability is location dependent.
Tesla Supercharger Map