How many driveways does your residence have?

You're fighting a pretty tough natural monopoly to get multiple sets of competing wires. That we have both copper and coax is a relic from the days where they could each only carry specific type of signal.

A form of competition could be fostered by making the wire layers into utilities that wholesale to transit providers. However, it already is this way on the telco side. In most areas, there is little third party interest for investing in competing transit networks, so the ILEC is left as the only provider. Perhaps there would be more interest if latest gen technologies were (de)regulated in the same way, but that undermines investment in new physical wires.