Seems more like an attempt at retraction to me... but as you wish.
Well, for starters, I don't think the current "one license fits all" method is any good. If you have any experience with firearms at all, I'm sure you would agree - the way you handle, use, and train with a pistol is vastly different than that with a shotgun, and is further still different than you would for a automatic rifle. We have different classes of drivers license - why not do the same for firearms? Require some sort of actual proficiency in using them.
Also, I would think it prudent that someone with a history of damaging mental illness or mental illness that could lead one to self-harm (or harm others) undergo additional scrutiny before being allowed to own a firearm. Right now, it is all too easy for someone who is suicidal to purchase a weapon and attempt to end their own life. This is where the additional mental health services would also come into play.
As for how it would help with robbery/murder/et al - typically, a normal, functioning, well-adjusted adult would be adverse to murdering another person without extreme cause. Some, obviously, don't give a flying feather, but for most people they talk a good game, but will freeze up if/when the time comes to actually take a life. This is a good thing all said and done - the question is, why do some not have that tendency, and how can we help them. To the other, what is pushing those that DO have normal inhibitions to be desperate enough to override said tendency and take a life in the committing of a crime?