big deal
Great thought!
So in canada (which oviously has a similar culture to ours) strict gun control helps. Their homicde rate as youve correctly pointed out is lower than ours (1.6 vs 4.8).
The other 70% kill with any weapon to get their hand on, but it is more difficult to kill, reflected in their lower homicide rate.
(again keep in mind guns arent just a problem in the number of people they kill, they also cause worse injuries than say knives and to more people)
A longer reply to your 6 outlined points is awaiting moderation