We're not comparing home charging to fast charging though. We're comparing fast charging locations to other fast charging locations. Home charging is absolutely going to be cheaper due to no demand charges, but for where people elect to fast charge, you colocate where they will already be. At work places, you would want to provide charging current rates as high as possible without incurring demand charges. This is not to hand wave away street parking charging! This is definitely an issue, but there have been great strides in developing charging stations for street use (integrated into light poles, for example). Does you locale have Dig Once policies (call to action: get involved locally if they do not!)? Throw some fiber in there while you're upgrading street power!

At home, I charge using power from Exelon's nuclear fleet at 1-6 cents/kwh (Time of Use plan). I want to stress: most people will plug in every time they arrive at home and charge at home. You will leave your house every day with a full charge by doing so. Supercharging costs me ~30 cents/kwh, so $10-15 for an 80% charge. Regardless, the costs are so low I don't care either way, I come out ahead versus gasoline (previously $40-60 per fill up) no matter how I charge. I literally don't even think about it when Tesla dings my credit card for Supercharging. It is annoying to use a J1772 public charger (install adapter, swipe Chargepoint card, troubleshoot why the station isn't providing current), so I avoid using those whenever possible.

In the US, you are never more than 150 miles from a Tesla Supercharger, and of course the network will continue to grow over time: https://supercharge.info/map