It also doesn't help that the quality of ground beef in the US is much poorer than other countries, so those who may regularly eat rare ground beef internationally would experience a level of shock if eating it in the US.

I mean, rare ground beef hamburgers are pretty much fine too. They have a higher risk of contamination, yes, but that does not make it a particularly high risk. I eat burgers, made from pre-ground beef, cooked rare all the time and I have yet to get sick from it even once.