Actually, it's one of the most commonly cited reasons.

One of the more common reasons people are leaving CA is retirement. In the 90s and thousands, it was pretty popular for people to move to Sacrament (Granite Bay and Auburn) to retire. Today it's Tahoe and out of state. People love to retire in the forest, but if it's going to light your house on fire, people will look elsewhere.

I don't know about unstable ecology, but I'm kind of tired of the yearly weeks of forest fires causing dangerous air quality here in the bay area.