You have the heads up: Why acquire real-estate if your status is by law temporary?

It was not by law temporary, it was by law indefinitely renewable. You just had to hold a job that'll sponsor you. How is that materially different from any "normal" person who takes a 30 year mortgage with no guarantee that they will stay employed that long? Hell, the vast majority of H1Bs have much greater job security than the average home buyer anyway.

Again change the law if you want. Give a heads up. Or dont. Nothing the current government does to home owning H1Bs should be rank ordered anywhere but to the bottom quartile of the greatest injustices being doled out.