It's by far the longest healing session Ethan's ever done. The actions of an arsonist make no sense either, yet they still set fires. Remarkable though it was only something like 2800 homes that were destroyed with all the fires that took place across the country. While the fires were extremely destructive on their own, it wouldn't take much to tip the scale either way. I'm not saying the woman steered anything towards or away from populated areas or guided it away from heritage sights, but for as bad as things were, it could have been much worse.
Now as for you laughing at a wolf with no hair, where did I put my razor. Punishment time.