I'll add, most of these controversies purportedly about "science" are really controversies about "the status quo that cherrypicks bits of science to lend itself credibility". Powerful men have defined reality for the proles long before they had any sort of science by which to claim legitimacy. "Scientific data proves it (and only an idiot would question THAT)" can be used (abused by dishonest people) in a manner very similar to "God told me I should rule over you!" The purpose is the same: "don't argue with me, accept it as truth".
If you want to see that in action, look at why aspartame as a food additive was originally not allowed, then why the FDA director was pressured out of the agency, and who replaced him and what his primary goal was (which was of course approving aspartame). That's what money does to what was formerly good science.