It's true that there's no such thing as a society that is entirely free of gun violence - or any sort of homicide, for that matter. But that's not the goal, and it never has been. The goal is to reduce such incidents down to a level that is comparable to that of other countries - a mere fraction of what exists today in the U.S.

Gun control isn't perfect, but it does a pretty good job in most of the world. You can't let perfection be the enemy of improvement.