A) In self-defense, you don't intend to harm humans, but are only doing so when it's down to your life or theirs. So such a system could be argued to not be designed to harm humans, but instead preserve your own life.

B) In any case, I'm OK with it. Having the software explicitly licensed like this may prevent it from being legally considered a terrorism tool or munition if a bad actor were to be found connected with it, and if that happens, that's going to have much more freedom-restricting consequences with respect to the software.