Hildegard, I think you have misunderstood or misinterpreted my meaning. It is not the fact that America is refusing entry, it is the amount of paperwork that is needed to be allowed to enter on compassionate grounds.
Ah, I thought that you have not yet been granted entry when you said that you are "trying to get an exemption". If you have been allowed entry and are just facing heaps of paperwork, that would indeed seem to be unnecessary and frustrating bureacracy.
I'm busy trying to work out if the UK are scrapping Day 8 tests for visitors from the USA as I, too, have American family who want to visit next month. At present the easing of travel restrictions is far from clear.