We are just gradually exchanging one belief system to another. Most of what we have as science is belief and trust. Instead of trusting any religious holy book, now we trust text books. Instead of gods and priests, it is scientists and theorems. There are good number of fallacies, misdirections, and bogus research in science as in religion.
In the past it was religion because human mind had been conditioned from childhood in believing in a supernatural power which can solve all our problems. But in today's world more and more children are conditioned into believing *science* can solve all their problems.
Bottomline is, humans have to believe in something. Lack of belief will do *bad* things to human mind. This is especially true in highly stressful situations, where we feel we don't have full control ourselves. Our mind tries to find assurance in other things which can have a influence. Those with weak reliegious beliefs as in the above study, in other words, those who already have a stronger belief in science will show a higher tendency to believe in science during stressful situations.
Now my question is, why should a belief in science better than belief in religion? If believing in something is essential for human mind, religion is anyday a stronger one than science, since it emphasises on absolute belief. So believing in religion might be better than believing in science as far as mental health is concerned... at least until the scientific belief system grows as strong as religion.