It would suck if your electricity provider one day decides that you will need to change all your electronics because they are switching to another frequency and offering you a package for the switch that costs just below the cost of moving away or building alternative sources. It would also suck if for example your telefon company stops connecting your calls upon the payment of your employer who suspects that you might be looking for another job and taking interviews.

So, no one has to create a telephone company or an electricity company as if they are charity, it's just that if they want to do it, they need to do it within the ruleset of the regulator.