The world is still a dangerous place, not only for children. But those who control the cultural memes believe it is better not to warn anyone of that fact. IMO, that is because they want compliant, weak subjects who are easily controlled when confronted by violent, seemingly irrational threats.
I have watched Blade runner with the sound off. The milieu is so well-realized. I am also a fan of Dick’s written work. Dystopia+noir is almost irresistible to me because it can teach us to recognize the results of our present actions. That is also the message in the original folktales as re-written by the Grimms.