“Lucky”? All things considered, not so much. If you want to pump them up to fit your campaign, go right ahead, but in real life they were both a couple of ill educated borderline sociopaths. The Great Depression brought out the worst in a lot of people and the best in many others. When you look at B & C just think of two high school dropouts pulling into a highway gas stations, robbing the place and killing everybody inside. The guy at the counter, the mom getting a soda...whoever.
It is said that “comedy is just tragedy plus time.” Maybe brutality plus time equals fame.