Alien cover up

[Anomalocaris]

Hypothesizing a specific version of alien is a separate thing.  

Recognizing there may be no way to distinguish technologically advanced aliens who do not wish to make their presence known is something totally different.

It is equivalent to saying we can not fully preclude the possibility that such of the universe as we can detect was the result of what we might regard as purposeful calculation.  

We simply do not emphasize it because it does not appear we have any immediate, either directly or tangentially, productive path towards improving our understanding of whether either is actually the case.  So we don't belabor them.

We don't become attached to specific possible answers to questions whose real answers we have no means of identifying.

Again, the exact argument for why God might exist.

So?   God by some non self contradictory definition might exist is a perfectly sound position, as is God by any non self contradictory definition might not exist.  That a specific God does indeed exist is the as yet totally unsupportable position which is effectively a willful delusion. That you ought to crave the favor a specific God allegedly offers for your believing his existence even when his existence is otherwise unsupported is where the position goes from unsupportable and delusional to utterly disgusting.