People have been conditioned to believe certain things and at the same time conditioned to not question things and that they are incapable of questioning things. They have been taught that they cannot question the Bible or they are heretics. They have been taught that they cannot question philosophy because they are stupider than the great philosophers of old. They have been conditioned that they cannot question the crown/government or they are treasonous. They have been conditioned that they cannot question scientists because the scientists are superior to them.

They don't even try.