It has to do with the logical fallacy that if you cannot stop all crime then why even have laws.

It is commonly heard used like this...."When you take all the guns from the good guys, only the bad guys will have guns."

This is an emotional push statement. It is meant to evoke fear with the "all guns" line and imply the person talking is "one of the good guys" meaning you can trust them.

It is not rational to take an all or nothing approach, however the gun nuts continue to use logical fallacies and emotional triggers to attempt to sway people.

I was simply doing it in a rather blatant way to show the absolute silliness of the gun control won't stop people from having guns argument.

It is not an all or nothing gambit. We can have sensible gun control.