It would be much easier to do shared wifi if we weren't trapped on a fraction of the potential wireless bandwidth that is not owned by some big business. Our communication demands are only excelling as time goes on and most metropolitan areas have intense spectrum clutter while we still have the current infrastructure. Imagine trying to route most of the Internet around wirelessly on just the 2.4 and 5ghz bands.

Corporations are failing because the government is setting them up for failure through regulation. It's not easy to start an ISP and as your sibling poster noted, it is not because of technical issues, but the laws that are in place.