If your town users a peak of say 100MW and is powered by two 50MW feeds

Then a new DC creates another 300MW of demand and builds 300MW more feeds

Then the DC goes bust, you're left with 350MW of potential supply and 50MW of demand

Compare with a highway, you had a 2 lane road, and it was fine, with 1000 cars an hour, then someone expanded it to 8 lanes and filled them with another 3000 cars an hour.

Then they vanished, and you're left with an 8 lane road for 1000 cars an hour, paying 4 times the maintenance for extra unneeded capacity.

You're kidding yourself if you think people are laying down in front of bulldozers out of concern for trivial maintenance costs on under-utilized grid capacity.