That's not so much about technology as it is about skill...


Besides; it's an often forwarded, yet entirely irrelevant argument that the U.S. did this to its own soldiers, too (I know you didn't phrase it as a pro argument):
Boxers voluntarily beat each other up. Voluntarily, and professionally. Do the same without consent and it's a crime. Nobody would ever be stupid enough to attempt to justify having beaten somebody up by pointing at boxing sports, right?