In the short-term, gun laws that require demonstrated proficiency before allowing the sale of a firearm may slightly reduce accidental injury, and likely do little to reduce physical violence.
This will all be moot in the very near future when people will be able to print their own firearms for practically free. Individual power grows along with technology, and laws are incapable of dealing with humanities failure to improve their basic nature in proportion.
Perhaps firearms can be made to be marginally safer, but the bigger issue is that humans need to evolve in decency before our capabilities reach existential levels. In the very near future, firearms will be nothing compared to the power of biological and autonomous weapons. Maybe someday we'll require brain "pacemakers" that dull the emotional centers when they become overactive. Then there will be hackers out there who circumvent it so they can experience the full range of emotion.
Cars are on the verge of becoming much safer as autonomous aids become commonplace.
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