Surely anyone of such stature would have left a few notes at least, none seem to have been found.
The problem with revisionist history as expounded by Fry, is that it is very easy to make judgements of medieval actions and sensibilities from the comfort of a 21st century Weltanschauung
The fact is, that if the RC church had not been there pre-Enlightenment, it would have been replaced by something else, equally cloaked in superstition, and probably even worse.