We certainly discuss the topic at some length in our Personal Protection classes and point out repeatedly the desirability of avoidance and some of the less desirable side effects of even successful self defense (e. g., involvement with the criminal justice system, legal expenses, potential psychological and physiological artifacts, etc.).
"It is long been a principle of ours that one is no more armed because he has possession of a firearm than he is a musician because he owns a piano. There is no point in having a gun if you are not capable of using it skillfully." -- Jeff Cooper