Killing and destroying need to be under the direct control of a human lest it become too easy.
It really is too late to put this genie back in the bottle.
Why?
Because other countries, if and when they get this technology, will use it.
Like trying to keep nuclear weapons limited to those countries that already have them. This idea is as old as I am, the UN supports it, but yet every few years, another nation gets nuclear weapons.
It would have to be globally legislated. I just don’t see every nation agreeing.