A supporter of gun rights might counter: what if someone doesn't want to rob you, but really wants to kill you? To this I would say that it's not realistically possible to defend yourself against a psychopath who really wants to kill you at any cost, armed with only your wits and a pistol. You would need an army of gangsters, or the Secret Service, on your side. In other words, you would need the government (or a similar organization) to step in and protect you.
The writer begins with the premise a citizen has a right to self defense but then contradicts that premise by claiming it is limited due to "important complications."While I do not dispute a citizen's right to self-defense, I believe this right comes with important complications, which render a general policy of gun control prudent.