The United States has a nearly infinite amount of unoccupied land. What's required is the political and social will to incentivize people to build.
The vast majority of that land is not where people want to live. Building houses there won't change that.
Change needs to come from above the system, not within.
It's not even a matter of policy or politics or us vs. them...it's gonna happen, like gravity happens.
It makes sense to be prepared.