That is true, and why to the solution to the US's slow internet providers isn't "get Google fiber to everyone". It should be "make it easy for new companies to provide service, even if another fast service is already available".
Throw a couple of billions to create fibre last mile to every home in the USA that would be owned by the homeowners and it would go a long way to solving the problem. As a side effect it will also create that king of blue collar jobs that US needs right now.