Intelligent people laugh at your theory that guns can be made safe.
Yes, most murders are done with hammers. How does one make a hammer safe? I have a stud 'gun' that takes a shell. Should that be made 'safe?' How about baseball bats? And, of course, butcher knives....Those things are SCARY looking and anything over a few inches long will KILL. Maybe we should all wear armored vests and bubble wrap. Heck, I saw a movie where someone was killed with a pencil through the eye. YUCK!!! Pencils are DEADLY. I remember there was a hired gang-killer that used an ICE PICK to kill his targets.
Lastly, I just read that a woman with a metal straw in her drink, tripped and fell and the metal straw went through her eye and KILLED her! Straws are DANGEROUS!!!