My response to that would probably be something like, 'Yeah, I guess. I don't think you are right.'
It's kind of like me saying, 'If I'm right, I'm Jesus Christ. If you are right, you're just some insignificant human.'
This sort of thinking seems to justify any kind of grandiose belief about one's self or one's fate, without any regard to its truth, just because it's more grandiose than whatever the alternative is.
Unfortunately, madness seems to lie in that direction.
And it goes the other way too: Those who accept that rendition of Pascal's wager are heading in the direction of madness as well.