Except the fact Trump is right...
They could have gone in ten years ago if not longer and started doing mitigation work. But nearly each and every time they tried, California government agencies (namely the CARB) got involved and shut them down. Or cities doesn't want the smoke problems. Even after Jerry Brown mandated prescribed fire on a 15 year plan, they still couldn't get it done because of government bureaucracy.
Newsom could have (and should have) shut down the agencies getting in the way and made it happen, but he didn't. California could have (and should have) kept on seasonal employees at a lower pay rate to do controlled burns or other mitigation work, but they didn't.
California right now is living up to the old scary saying of "I'm from the government and I'm here to help."