Psychology tells us, when Propaganda is repeated often enough, people start believing everything. Chrisitanity had quite some time to take roots in general public mindsets. The debates on this topic are more often aimed to leave so to speak "reasonable"
doubt in the minds of people, so they can keep believing.
Additionally what makes it easy for the demagogues to discredit science, is the often rather limited understanding or the discomfort which leads to not wanting to understand the scientific ways. What theory really means, how they are disproven and then replaced by a better theory, that uncertaintinty is not euqal untrue and much more.
I am for a long time now and still am of the opinion that the Age of Enlightenment, which arguably started inbetween the second half of the 17th century, never ended.
As we humans are an empty container, lacking experience and knowledge when we are born and there is all kind of believes and knowledge with whom we get in touch over our lifetimes, therefore we also need to put some energy to keep a general level of understanding in the population, otherwise that what has once been thought is lost or ignored or put into chains by those who think they know/believe "better".