I really understood the points in this post until the last sentence. I think that attitude is likely behind the push by some to quarantine only health care workers who have helped people in Africa, which, IMO, is punitive and illogical and meant, ultimately, to punish them for deciding to assist some foreign element. I find it xenophobic and nationalistic.
Further, nationalistic isolationist attitudes are naive, at best, IMO. We do not exist in a vacuum. We are all members of the human race, all equally deserving. An us against them attitude when it comes to lifeboat ethics can actually harm rather than help us. Because if no one is treating and helping prevent the spread of disease outside of our borders, how the heck can that have no impact on us? What happens in one part of the world affects the rest of it via a domino effect. Any massive, major shifts in populations, health statuses, poverty levels, etc., in one area, creates ripple effects that eventually impact the planet as a whole.