LOL.... Check your scale on that Colorado map... That's a LOT Of open space between charges in Colorado. I hear ya though. I guess if you think of the use case: "long trip charging" and not "convenience charging" then I guess the spread makes sense.
The ones in Denver don't make much sense if you ask me. One is at their showroom - which I get, so they can Demo the cars. The other is on the way to the airport - which if you know Denver, is WAY IN THE HELL OUT THERE IN KANSAS. There is literally no reason to be driving out there, unless you are going to the airport. So why that makes sense for a location for a SuperCharger, I have no idea.
I live in Boulder. We are probably one of the most uptight, green, Pro-EV, tree-hugginest, crunchy, granola cities around AND the home to Elon's Brother's flagship restaurant - The Kitchen - and the closest SuperCharger is almost 40 miles away.
I think they just don't want people using them for anything but long trips.