They need to understand what's happening in the real world in order to deal with very real problems.
Do they really have a need to understand?
Generally speaking, most people don't understand what's happening in the real world, and for the the most part they get along just fine. If that means they make poor decisions about economics, global warming, when to go to the doctor, or who to vote for, then so be it.
People who insist that Genesis literally describes how creation happened are just fine not becoming scientists, so scientific reality simply does not intrude on any activity they have any desire to take part in.
The bottom line for most fundamentalists is that evolution, big bang cosmology, geology, paleontology, etc. are completely wrong about everything. Why scientists are in those fields are wrong scarcely matters, so if it turns out that some easy to believe explanation of why they are wrong is incorrect, then the correct explanation, which they would barely understand is out there. Digging to far into things may risk a Faustian outcome.
Further fundamentalism comes with the ultimate rebuttal. From 1 Corinthians 3:18-20:
quote:
18Let no man deceive himself. If any man among you seemeth to be wise in this world, let him become a fool, that he may be wise.
19For the wisdom of this world is foolishness with God. For it is written, He taketh the wise in their own craftiness.
20And again, The Lord knoweth the thoughts of the wise, that they are vain.
So yeah, the empirical evidence may show something, but a fundamentalist can cite the verses above and others if needed to simply dismiss such evidence.
For those few fundamentalist that deal with addressing creation/evolution topics in a scientific fashion, I believe that many of them are not simply willfully ignorant. Many of them are simply dishonest.