It is exactly the same approach as used on other monopolists, even many that have not been shown to have abused their monopoly: e.g. imposing local loop unbundling on incumbent telcos.
A reasonable point, but whereas you can go out and buy a new computer or operating system tomorrow, you can't just wire your house up to a different telco. Infrastructure is complicated. If private enterprise were the easy answer people suggest, surely we'd all be enjoying ultra-high speed fiber broadband by now.