The scientific method IS the best tool our species has when it comes to determining truths about the laws of nature. In fact, it's practically the only tool we have. Almost every major advancement our species has made has been because someone had a theory, figured out a way to test it, and came to a conclusion with some degree of confidence that they were then able to act upon and share with others.
Since this is a thread about philosophy, "truth" (and how one determines it) is extremely relevant. Epistemology is a whole branch of philosophy. If you're truly skeptical, one could even argue that true knowledge cannot be attained at all, and all we can hope to do is arrive at conclusions with as high a degree of confidence as possible.
My point is that science offers a way to increase confidence in a conclusion, religion does not.
It's as simple as that.