This same thing comes around heavy with every new generation just like with vampires. It will get old and then come back and sucker the new generation into believing it and then mess up a new batch of people . It's sad and it's wrong. But it makes money and that's all they care about.
Because that's what sells. It's what people want to see, the same reason why there are so many movies about vampires, witches, the occult, supernatural things. Jesus himself said that Satan is the ruler of this world, it is under his power. That explains the reason for the evil in this world, and movies and TV shows reflect his thinking.