Duck and cover drills were silly, and your grandparents knew that. They made jokes at the time about their nuclear-proof desks. It was always propaganda to make a nuclear war seem survivable, and fortunately they never had to find out.

Kids Today(tm) do active shooter drills. And those aren't useless. The news is full of kids who actually have to implement them for real. Most of them don't die, but it does mean that they have to live with the consequences of knowing that it's a genuine possibility.