The article itself is showing exactly what happens when you have price controls - supply dries up and the market falls apart.
A price control that sets a price where a sufficient number of people are willing to perform a service or make a good do not cause shortages. Such a control in such a circumstance prevents companies from having too much pricing power over essential services. Thus they do accomplish something in such a case.
Price controls can be a good thing and when done properly allow for providers to make a sufficient amount of profit to be worthwhile for enough people whilst preventing gouging.
Preventing "gouging" is the effect of capping the amount the of profit. Regulating the price that utility companies can charge has not resulted in shortages. For the most part, regulating how much insurance companies can charge has not resulted in shortages. Price controls, in and of themself do not cause shortages.
If you have to apply for a price hike, and it can be modified or refused, that's a form of price controls. And climate change isn't causing PG&E to be worthless idiots; they've always been that. The change is in the climate of the courts; they're now being held responsible.
Reading the article is a superpower.