I don't think that's the point. I think everyone should see this movie, BUT with the understanding Dan Brown is performing histrionics and lying about factual documentation.
The Gnostic Gospels, which this whole concept is derived, have been more than debunked back in the first or second century. They hold no claim to truth, can not be backed up by other historical fact. It's just as important that people know the facts and use them accordingly.
The entire t5hing is a work of fiction. It's always been a work of fiction. Dan Brown has stated repeatedly that it is a work of fiction. What is the problem with that?