I never was a dub. I was brought up in the Open Brethren (as fundie as they come) and as I got older and more enquiring (pre-internet days) this was an issue which troubled me and has intrigued me ever since.
The question was: how can intelligent and enquiring minds blindly accept stuff for which there is no evidence, and stuff which the available evidence disproves?
I apply this to my own late father. He was a very senior Inland Revenue Inspector, whose work depended on evidence, law, etc. He had an extremely forensic mind and was well-respected in his field. And yet, he accepted (at least outwardly) so much stuff religiously that was increasingly unproved, unproveable and unlikely. I noticed as he got older (and in retrospect this feeling is strengthened) that he avoided discussion of religious stuff and I believe that he came to increasingly disbelieve stuff. I believe that he was able to separate his religious beliefs from his 'everyday' life - and I think that this caused him some pain as he got older.
The amount of information available to anyone with access to the internet and sources has increased exponentially. That's why some religions fight it. Fundies can no longer bask unchallenged in 'knowledge' confirmed by selected books.
I sometimes consider asking for a JW 'bible study' - starting from the origins of the OT. They wouldn't/couldn't do it, so I disabuse myself of that idea fairly quickly.