As a counter point, go look at the Los Angeles Department of Water and Power. It's a publicly owned municipal utility and is notorious for its corruption. The DWP doesn't perform any maintenance, lettings things break completely and then having to fix huge issues. They were the group who failed to fill a reservoir in the Pacific Palisades to save some money where firefighters weren't able to use to fight the fires.

Ideally, the dwp is accountable to the city, and therefore to voters and the state, in a way that a private company profoundly is not.