There is a fundamental difference in cognitive abilities between leftists and normal people. Leftists believe the worst of people, especially themselves. They do not trust their own self-control. It's easy to see because they are the most willful people on the planet.
Normal people are cognizant of impulse control, exercise reflection (thinking about actions, reactions and consequences) and practice delayed gratification.
It's no wonder leftists want to ban guns - as irrationally frightened as they are of everything around them (including themselves) firearms represent the epitome of responsibility - a concept that leftists never learned and are utterly incapable of possessing.
Perfect.
I can’t be trusted with a gun, therefore you shouldn’t have one.
Compare to the definition of a sweater: something you have to put on when your mother is cold.
“I never killed anyone who didn't need killing.”