A pedantically accurate retort, but ignores the real point.
Shutting down these lines for "inspection" is not feasible. These lines are the backbone of a grid that millions of people and services rely on 24/7/365, and there is zero redundancy. They are responsible for delivering power to hospitals, traffic lights, schools, airports, grocery stores, homes, businesses, and the list goes on.
Telling people "We need to turn off your power for a couple days every couple months for inspections" is going to create a lot of backlash, no matter how good the reason.
Also, the lines in question aren't like closing a two lane road in a small neighborhood for a couple hours where a few annoyed people can take alternate routes. It's more like shutting down all the freeways in a major city for a day just so that the DOT can finally get some street sweeping done. Good luck not starting a riot.
The problem is, these systems are old, too many people rely on them, and there is no redundancy.
If we want to take a step towards fixing the problem, the best start is to create redundancy for power supply to consumers, imo. Preferably more localized power generation via wind/solar/etc with some localized power storage.
Also, their profit margin for one year is not a fair argument towards them being at fault. Economics of public companies are about a lot more than "We made extra money, so we should have just spent it on making our product better". If shareholders don't make money in a company, they pull their investments. You pull enough investments in PG&E, that means they have to cut costs. Meaning, less money for inspections and improvements to the grid.
Economics at scale is not a black-and-white, napkin math, solvable problem.