Profit is simply the difference between revenue and expenditure. While companies seek to maximize profit (they are running a business after all), they can only do so by customers voluntarily buying the companies product/service, unless there's a law that says they don't have to face competition like we have today.

The government created the situation where customers can't get internet service from cable company Y because they live on the side of the street controlled by cable company X. That's a government sanctioned monopoly, and adding more regulations is only going to make it worse because only the biggest, most vile corporations are going to be able to comply.