H1-Bs are not unfair to Americans, even when abused. All this talk about protectionism and fairness is really bizarre to me. Thought experiment: Imagine if Can

H1-Bs are not unfair to Americans, even when abused. All this talk about protectionism and fairness is really bizarre to me. Thought experiment: Imagine if Canada found a cure for cancer but chose to sell it to Canadians only. Would that be fair? Would it be fair to Americans that can't get access to it? Job protectionism makes some people entitled to jobs based on random circumstances at birth. How can rational people think that _this_ is fair?