A forgotten aspect of gun control is suicide. We can prevent a large portion of suicides by smarter gun laws. People struggling with mental health and depression shouldn't have easy access to firearms.
When you listen to psychiatrists about suicide, it's a temporary decision that is made permanent if there is a friearm easy to access. Suicidal people might think about it for a long time, but they are only willing to act on it for a brief moment. Experts will tell suicidal people who have firearms to take their guns to a freinds house. Or even the act of having the ammo in a separate part of the house from the weapon can give a person enough time to reconsider. The time it takes to go to another floor in the house and load the weapon is more times than not enough time for a suicidal person to change their mind.
Firearms is just such an instant and permanent suicide method. There's just no chance to change your mind if you have a moment of overwhelming grief. Other suicide methods take longer and offer chances to change a mind. Pills act slow and give someone a chance to throw up or call for help. Hanging can be ineffective if you don't do it right and takes some time. But a gun, a gun takes an instant and there is no taking it back.