“At least nine ‘non-human craft’ have been recovered by the US government – some wrecked from a crash, and two completely intact.”
Sorry, if these space aliens have the technology to travel 10,000 light years, they are not going to crash their craft next to a meth lab in West Virginia.
You assume they are not a desperate and ragtag group.
Or tourists.
if these space aliens have the technology to travel 10,000 light years,
—
They have always been here - they are not new arrivals. They may even have been here long before humans arose 300,000 years ago.
And that seems it's where they always crash! Or a trailer park in Arkansas.
IF the aliens can travel through space their technology far outstrips anything we have.
And Will Smith won't outfly them in a F-18.