"But assiduous firefighting is also to blame."
They don't spend much time talking about the most obvious force that drives the "assiduous firefighting". The expansion of the suburbs have pushed human habitation out into what used to be the middle of a forest. Also, the increased popularity of what is sometimes referred to as "country living" but which is really a form of low density suburban living, has added to the trend.
The point is, areas that used to be free of humans now have a bunch of $1.2 million dollar homes. And thus you have an affluent demographic that is pushing hard for "assiduous firefighting". And that trend will continue so long as the suburbs continue to expand, which will likely be a long time.
The article has a tone that suggests policy makers are simply making an mistake by engaging in "assiduous firefighting". Overlooking the political forces that drive this make it difficult to understand why it is difficult to stop.