“What’s to say that intelligent life looks similar to humans.”
They are shape shifters and have been written about extensively throughout history. The main thing to remember as a given, is that time, space, and dimensions are flexible for these entities. They are not “limited” by our own primitive understanding of physics. They cannot be assessed by our laws of physics, they can manipulate their own laws of physics at will.
The idea of shape shifters is not something I can say is real, but I can’t say it’s not real either, we simply have no idea what is out there.
I do agree that if intelligent life has traveled to Earth, they have an understanding of physics that can’t be comprehended by our knowledge of physics.
My basic point is, I believe somewhere out there in the universe intelligent life exists, what form it takes and if it’s traveled to earth I have no idea about, so far it can’t be proven or disproven.