When ideas are actually being trafficked -- that is when they're new and struggling for breathing room, they're rarely clearly right or wrong. Consensus forms over a fairly long amount of time. With luck, and a lot of verification, over the course of a decade or three theories elide to the canon of science's best understanding of a given problem space. There we might broadly refer to theories as "true", but that's just everyday conversational shorthand, not the language of science.
The problem in the intersection with pop culture is that it's generally only well after those couple of decades of a theory working its way into the canon of scientific understanding that it begins working its way through pop culture. This is the critical point where there's a lot of naysaying from the general public and a lot of rolled eyes from scientists. It's at this point that science transforms into politics: each side hardens their positions, begins stating them in absolutist terms and tries to win the other side over, usually based on an appeal to authority.
Science itself is, in fact, a slow and reasonably democratic process. It is at times dogmatic, but far less than, say, American politics.