Which would be deserved, I think. There's plenty of evidence of human settlement in Asia over many thousands of years. It's the evidence in the Americas that is spotty and recent.
That's not to say that there couldn't have been any groups migrating west, but it's pretty clear that the population here arrived from somewhere else. There was no evacuation from the Americas.
But that's the zinger. Just because they haven't found it doesn't prove anything.