When it comes to security, your default position should always be one of extreme scepticism. Believing "what has been given to us" is what got us in this mess to begin with.
There is a difference between extreme skepticism in the face of one story, and postulating hypothetical scenarios that have equal or higher burdens or proof, and are less likely or more difficult to demonstrate.
In fact, in terms of logic, the two are diametrically opposed.