And some people really WANT to believe it's true. They've built their entire worldview around it and the idea they've been duped would cause a massive narcissistic injury.
It a way science is very similar to free speech. Its can be very harmful when misused, but generally the answer to bad science is not LESS science, but BETTER science.
The proper role of the education system of any given country, and a good predictor of its success, is how well it teaches us to evaluate the difference.