Public transportation is public. Private shared transportation does not have nearly the same incumbent advantage. Anyone can build or buy a bus, and move peopl

Public transportation is public. Private shared transportation does not have nearly the same incumbent advantage. Anyone can build or buy a bus, and move people around. There is not Facebook to pay lots of money to ensure that competitors are locked out of providing a similar service. Moreover, users actually get meaningful choices when it comes to which car or bus to take. ISPs are more like roads, a utility where the options (in many places) are very limited.