Nothing wrong with a little pseudoscience. Without it, most science fiction would never exist. As they say, never let the truth get in the way of a good story.
As far as people believing in it, well I also don't see the problem. If someone believes in something because they saw it in a movie or heard a director talk about it, then they are clearly quite gullible. Thankfully, these people rarely have any sort of social influence so their misguided beliefs aren't usually passed on. And then sometimes these people run countries.