Yep, there are witnesses and non-witnesses. That about sums it up.

The attitude of many non-witnesses seems to be, "Don't tell me about anything that I'm not willing to consider as possibly being real, because I don't want to hear about it! You must be one of those tinfoil hat types, those crazy conspiracy nuts."

Evidently they would rather remain exactly as they are, believing only what they already believe, and they'd rather that the rest of the world remained that way too. ;-) They are bothered by things they haven't thought of themselves or experienced themselves, therefore they assume those things cannot possibly have any validity or reality.

It's a natural form of conservatism in people. Dogs are like that too, but on a bit simpler level. As long as you don't change anything, they're happy.