Because the companies that supply the Electric power,
1) Either have their hands tied so they can't get to the Poles and wires anymore.
2) Can not remove the tree or brush in the power line areas.
3) Have had limits on what they can charge and NOT allowed to declare bankruptcy.
4) Have been pocketing the money for repairs and upgrades and not doing them.
BTW 1,2,3 are all in California. 4 is in Texas and other States.
The Power Companies will most likely be taken over by the Feds, and then it will be even worse. IMO