This is really not some controversial discovery. Providers already know this and take full advantage. It's common for multi-tenants buildings to be wired by 2-3

This is really not some controversial discovery. Providers already know this and take full advantage. It's common for multi-tenants buildings to be wired by 2-3 ISPs and even nearby single family housing to have only one with serious installation costs on top. Barring regulatory failure, providers don't even need to "open a street" precisely because of the other installations that already exist where wires can be run alongside.