Maybe using wood will be banned.
Anyone using insurance money to rebuild their house is not likely to put much of their own money into it. They did not ask for this disaster. They have other things in life to do.
Since the land is 2/3rds of the value, smart people will take a cash payout from the insurance company and seek an existing house elsewhere. Then they can remove the refuse from their land and sell the lot. It is not likely to make a profit, but it avoids the hell of living in temporary housing (surely in short supply) for a couple of years (or more) as the home is rebuilt.
Oh, and Trump is deporting all the illegal aliens, and these are the people who do almost all of the construction work. It is difficult to build a home without the skilled labor to do the work.