I don't disagree when looking at it in isolation. But my comment was specifically to Switzerland which has according to the department of statistics around 30 cases of robbery per year which basically never lead to physical harm. It is just not something you worry about in your day to day live.

Drug addicts usually want to be left alone and won't bother you. Exception being people chuck full of cocaine and alcohol in and arounds nightclubs frustrated about not getting layed.

The problem is being tackled the other way around by trying to keep poverty, inequality and thus acts of desperation low.