The U.S. doesn't have its covid vaccine mandate anymore but the unnecessary travel vaccine mandate is still in place

The U.S. still has its covid travel vaccine mandate yet almost every other country has repealed their travel vaccine mandate, even Canada and Thailand, and Thailand was considering bringing back its vaccine mandate but they decided not to. I also find it very hypocritical is that the U.S. bans unvaccinated international tourists (including those from the Canadian border) but allows migrants to cross the Mexico border without checking vaccination status.