The government already picked a winner years ago, just like they did with electrical service, natural gas service where offered, and telephone service, when it first allowed a cable company use of the right of way to either bury wires or string them on poles (or bury pipes in the case of a gas company).
Once one company is in that position, the economics of another one coming along and also running wires in order to maybe get some of the first company's customers to switch over is usually considered unlikely to provide a sufficient return on investment to make it worthwhile.
Besides, having 37 different companies digging up your yard every other week would likely cease to feel like FREEDOM! in short order.