evolution -- ppl who refuse to acknowledge reality tend not to leave many offsprings. and if they do, maybe they are adhering to a more powerful reality afterall.
That's realy inaccurate. If anything the more religious you are the more offsprings you have. Atheist societies are below replacement levels. What makes you think fact based thinking leads to more children making?
given the unknowability of reality - 'facts' in science are only hypotheses that have not yet been disproven by data - nobody knows why anything exists at all -
a lot of weight has to be given to 'what works' - what things grind up against the machinery of reality and survive over the long term? there is a 'truth' to such things