In Australia, one of the problems that we face (and we have much more of a culture of "let it burn" and doing controlled burns than CA) is that chaotic weather (almost certainly the result of climate change) has reduced the number of days available for controlled burns. You need pretty calibrated conditions to do safe controlled burns - not too wet, not too dry, and not too windy.

Last round of big fires in Australia, the scale of the fires were contributed to by fewer available days in the previous years to do the burning. Plenty of dipshits with axes to grind blamed it on the "Greenies" as per usual, but the people who manage the controlled burns had another story to tell.