Have you ever considered that in a world with "statistically" more trained martial artists than potential victims, "statistically" fewer people would ever dare to think of attacking, thus creating a world with "statistically" even less violence...?
no. history shown this isn't true. more martial artists would just lead to better ways of doing violent. never underestimate human capacity for violent. if there is a way, we will find it. anyone, giving the right circumstances, will do violent. for example, i was attacked,... nay assaulted, by a large supremely deep dish pizza. i had no choice but respond in violent, with extreme prejudice. it was quite satisfying afterward, i was not sorry about it!