Why is it a non-starter?
If it won't progress the situation (contrary to all the evidence from around the world, not to mention common sense, that it will), what will? Why is it that we're the only developed country that suffers mass shootings at such an enormous scale, if it isn't the widespread availability of guns?
The same reason we do not get rid of free speech in order to fight racism.
Yes. Do you believe that gun crime is one of the most obvious and lethal examples of violence in our culture?
"One of?" Sure.
Do you believe that other developed countries need to address poverty and education as well?
Yes
If other countries, like us, also need to address poverty and education, why do they have so much less gun violence?
Because it is a multi-faceted problem that is, in part, embedded in our culture.
I would also say, and have said in other threads, that health care is another facet that needs addressing.
We are discussing murder rates yes? U.S. was 4.9, Turkey 4.3, Estonia 3.2, Canada 1.7, France 1.6, Israel 1.4, cyprus 1.3 many others are 1 or below. These are the "developed nations."
But are the developed nations really the standard by which we should compare?
Why are South Africa, Russia, Brazil, India, and Mexico on that list?
But to answer your question: despite other countries having some issues with poverty and education, The U.S. has more gang and rival gang activity than most of these "developed nations."
The U.S. also has more wealth disparity than most of these "developed nations," and less economic mobility.
The U.S. has pretty large disparities in education as well. Do other countries in the developed nations budget schools locally so that there are disparate funds going to high and low income school districts?
Regarding health care: the U.S. is notorious for there health care disparity. How do the other countries compare? How is access to mental healthcare?
In addition to all of this the U.S. has more people than most of these countries. This translates to more urban areas and it is the country with the most wealth.
We haven't even touched on cultural violence, historic and modern racism, emphasis on the individual vs. the community, religious bigotry, the fact that the U.S. imprisons people at a rate higher than any other nation in the world (not just "developed nations), how we treat minors in the justice system. Yeah there are many factors that need addressing.
But while we are at it. What was the homicide rate for any of those developed nations for the three years prior to any gun legislation and three years after?
Did you see a drop from 5 to 1? If not, do not pretend you will see such a drop in the U.S.