I think it's hard to tell.
because obviously, those who believe to have had religious experience are not going to be convinced by a scientist informing them due to the high levels of this hormone or that chemical that they had an apparition
similarly, someone who has not had any experience would then not be convinced by someone saying that things had been revealed to them or they had had a vision.
It would also be very rude to ridicule either side for their belief. As Wittegenstein (i think, if i ahve the right philosopher, sorry if not) you cannot laugh at someone else game if you do not understand the rules ie, you cannot laugh at a belief if you do not understand what it is based on. as we can never truly get into someone elses mind and so can never know the influences.
I'm as sceptic as they come sometimes, but i don't believe you can rule out the supernatural if you ahev no experience. But then, you cannot make it 'fact' either if you do ahve experience. I felt i had experience of the supernatural once, but i don't know what it may have been.
as to being hardwired to believe in something, that's interesting. I wouldn't say that was nature, rather nuture. Like every child (well, almost) is led to believe in father Christams, and when you're 6 it is perfecetly acceptable to believe that Santa can in fact come down the chimney, can eat a mince pie in EVERY house and not seem to explode, adn can carry every present in one night!
But that's not a biological requirement, we are just more impressionable when young.
I think one way to look at it is many people offer personal evidence of supernatural. people may try to prove it, but there is no way to disprove it