The value is “absolutely nothing” if, as you said, the concern is bringing in new variants. It only takes one traveler to do that and the antigen testing will not even remotely prevent that - so what’s the value?I don't recall reading that the value is "absolutely nothing." Antigen tests aren't as sensitive as PCR, and so there are many false negatives. And it's certainly possible to become infected after taking the test and before boarding the flight. But from what I have read it is my understanding that even antigen tests 24 hours before a flight can manage to flag a significant number of contagious people. The more contagious people we keep out, the better, right?
My POV is that, being now almost 2.5 years into this crap, we just need to get back to normal and let this thing run it’s course.