How many people prefer to blindly believe in hard coded, immutable, seemingly absolute truths that were written centuries, even millennia ago rather than in the partial, ever changing but at least verifiable truths of science?
More OT, people usually don't change their religion as easily as they do their shirts. For example, ancient Jews didn't abjure on Yawveh, even if their lands, including their most sacred places, were burned to the ground at least twice in the course of a couple of centuries.