Another obstacle is rights of way. You cannot just tear up streets and bury cables. And in practice, you also cannot build a cable network through private prope

Another obstacle is rights of way. You cannot just tear up streets and bury cables. And in practice, you also cannot build a cable network through private property either, because you inevitably will encounter some owners of real estate who don't care about your network and thus have no incentive you allow you to build through their property unless you pay them as much as you can, because that is what they are going to be asking for. So, in practice, networks are built on public ground, or potentially using eminent domain. Neither of those should result in exclusive ownership of the market thus obtained.