The other thing that is subtle and maybe not obvious about American culture — firemen generally are not lumped in with the rest of the government. Police are looked at with extreme suspicion very frequently, but firemen are just generally liked. Yes there are people who don’t want anyone on their property that they didn’t invite, and in some states those people have the law behind them (I grew up in Texas), but firemen coming by to let you know that your property has too many trees near the home are probably the least likely to be shouted off. There is one group, though, that doesn’t want to hear the message - the wealthy. Often they have an image in their head of how they want their house to look and what kind of landscaping they want, never mind what best practice is. They will listen politely and then completely ignore the advice they get because it would keep them from having the picture perfect English cottage look, or maybe they’d have to see their neighbors in their winter ski chalet, or whatever it is that’s in their head. When the Tahoe area has a fire like this, it will be because of these attitudes, 100%.