Now imagine if we create a separate company that invests in infrastructure and sells energy to willing buyers who don't have to deal with this. We could call it an energy company.
The difference is in motive. You want to have a cheap energy bill, the energy company wants to make a profit that grows every quarter. Those two goals are eternally at odds.
Now imagine this hypothetical "energy company" has the community over a barrel with no viable alternatives, and uses their monopoly to jack up power rates and screw the community.