In high school, in shop class,
above the pencil sharpener, was a framed photograph of our instructors finger, sliced open in a rip cut on a band saw, held open by a surgical probe, with a background of surgical gauze.
He put it there to remind us that tools are dangerous, and that every time you pick one up and push the button you have to have thought out what you are going to do. And what could go wrong. Even to the experienced.
Our culture sees weapons not as dangerous tools but as toys.