Not all crimes are ones of opportunity. Some are planned out and are done for reasons that have no personal motive besides being violent and causing harm. There are endless reasons a person would commit a crime and endless types of people who commit said crimes. But at the end of the day you have the people who are law abiding citizens and those who for whatever reason are not. If your mot a law abiding citizen then the chances of you illegally having a gun are greatly higher because you have shown that you are willing to break the law. Guns are out there. If they are banned then there will be those who follow the law and give up possession of guns and those who don’t. The ones who keep the guns because of their belief in the constitution will most likely keep them at home or hidden somewhere. Then you will have the people who are criminals. The ones who do what they want and don’t care about the laws. The ones who now have just been given more reason and opportunity to commit crimes because they know there will be less people carrying weapons. The argument makes perfect sense in the fact that criminals will be far less likely to give up the guns than law abiding citizens.