> I don’t see how any society could function if it didn’t have a strict anti-bullshit filter
I don't see how science can ultimately function if you aren't allowed to push back and legitimately question things. All things. How many times have we, years or hundreds or thousands of years later, come back and disproved something that was a "scientifically proven" thing in the past? How would you accomplish that if you aren't allowed to talk about it? Relatively few things in science are actually indisputable, and I question even that. Some things that we think are indisputable today we might laugh at a thousand years from now, just like we laugh at some of the primitive thoughts our ancestors had, but were cutting edge for the day. Science is the pursuit of truth through rigorous testing and pushback. Eventually, if proven enough times, we call it a law. You have to be open to being completely wrong to actually obtain that level. Free speech is paramount to science, as well as society.
Society, as a whole, has worked fairly well without "bullshit filters." It's when you start putting them on that you start having issues, and often in areas that you didn't anticipate, because at that point you're acting on a belief and not a fact.
I highly recommend reading Carl Sagan's The Demon-Haunted World: Science as a Candle in the Dark. Here's an interview to give a preview: https://www.youtube.com/watch?v=3JpQFVXGzUI