Not sure how you think they cashed profit margins - again they create new wealth from a guaranteed rate of return on invested capital - both of which needs to be approved by the state utility board. All other costs are transferred to the customers on a 1:1 basis. And there is no doubt every company/utility could cut costs in some way, but to say they are intentionally overcharging to make a cash profit is not correct.

If by someway they could see the future, perhaps they would have built the grid in a more robust state, but that would have been more expensive back then and customers at the time would not have been happy about it - costs would have been higher, let alone the utility board approving rate increases for extensive costs to cover what would have seemed to be an imaginary future scenario.

I hope this helps some in understanding how this works, it’s very complicated and has taken me years to understand. Nothing is black and white.