We are into our physics about 150 years. If another civilization did not suffer a Dark Ages, they'd be almost 2000 years ahead of us. It is just foolish to claim those objects, which are seen by many people, don't exist merely because we can't explain them with our current understanding. It makes more sense to make the effort to explain how those objects DID get here.
Your approach is like this: You take an airplane back to the 1500s and fly it for some onlookers. They go tell their friends what they saw; but, they are not believed. After all, such a thing is impossible based upon what they currently know. The same would hold for a demonstration of a 3D printer ... anything really.
I call your form of physics "Ostrich Physics". It isn't there if I don't understand it.