Dunno. Why haven't they determined the cause for the fires that killed 42 people in Napa/Sonoma? In the past investigators have been able to pinpoint large fires to a single illegal campsite. Here we have several breaking out simultaneously.
Last I heard dozens were still missing. Can't see any news after the middle of October for them.
Maybe there's nothing devious here. Maybe its just because editors & reporters these days are borderline illiterate. Maybe they have trouble focusing on any one thing for more than a few days. Mainstream news is close to worthless in this country.
The media have stringently avoided the complications of legalized cannabis, namely surges in property and other petit crime. There is no way they would want to indicate any possibility of major arson involving the competition between cartels and domestic producers, or the violence that accompanies that competition.
Those fires did significant damage to major pot growing areas and crops.
While that may be incidental, it seems unlikely that those areas were only coincidentally affected, and more likely that other damage was collateral, not the pot fields.
Pointing out the target (if that was verifiably the case) might dampen enthusiasm for legalization.
Besides, legal pot means the media writers don't have to work so hard to entertain or bamboozle the masses.