Right, so your future felon is a law-abiding citizen now.

> These laws primarily harm law-abiding citizens — who were never the problem in the first place — far more than they restrict prohibited persons from acquiring guns.

When you sell a gun to a law-abiding person, you have no idea if that person is going to become a felon or not. There is no hard line between the two, any law-abiding person can become a felon at any point.

This is why the rest of the world restricts people from owning guns.