I can't speak for all Americans, but in the two cases when I've set up a Wifi link: #1 - I don't really want an aerial cable running through my back yard, plus

I can't speak for all Americans, but in the two cases when I've set up a Wifi link: #1 - I don't really want an aerial cable running through my back yard, plus it'd have to be pretty high to give enough clearance for the septic pumping truck. #2 - running cable between the 10th and 13th floor of buildings across the street from each other would require permission from both building owners, and maybe a permit from the city too. While a wifi link just sits in the windows on each side.