I would suggest you consider the possibility that the current understanding of physics a thousand years from now will look very different from how it looks toda

I would suggest you consider the possibility that the current understanding of physics a thousand years from now will look very different from how it looks today. Even more so a million years from now. The reality is that we're not a particularly intelligent species - as shown by the fact that we're currently terraforming our own planet to make it less hospitable. Our culture may well be extinct within a century. So I think it's optimistic to believe that we as a species have much of a clue about anything at all. Now put that in the context of an extremely old universe, and it's not hard to understand that we're unlikely to be the smartest people in the room. FWIW I'm agnostic about UFOs. The problem is that they conflate two issues - aerial phenomena, and alien visitation. There's no reason those should be connected. Or that the latter would inevitably be responsible for the former. The scientific thing to do is to collect evidence of the former before assuming the latter.