It's good to approach the topic in terms of solution-thinking, but it more or less looks like a lot of the problems involved are political:

https://lhc.ca.gov/report/fire-mountain-rethinking-forest-ma...

For the executive summary, look here:

https://lhc.ca.gov/sites/lhc.ca.gov/files/Reports/242/Execut...

California is big, the state itself controls a fraction of land, so there's a coordination problem with private and federal parties. Prescribed burns can actually be a tough sell. Resources are an issue in every corner. Known positive policies don't proceed apace because these are unsolved political problems.