People who shoot themselves normally do so secretly. Somebody has to find all those dead bodies. What do you think it's like for those family members, cleaning ladies, neighbors who start to smell something unusual, or perfect strangers to find a person who has killed himself with a gun? Do you think those people ever forget that sight? For the rest of their lives? Who gets to cleas in their home or car or a hotel room or maybe in the woods or some other remote location, what happens to their guns? Hopefully, most suicide victims' guns get turned in to the police, but with tens of thousands of people a year shooting themselves, it sure seems like at least a few of those guns may end up in the wrong hands and end up being used in robberies and homicides of totally unrelated innocent people.
Sorry if this is off topic, but I think it's important. Lowering the number of people who shoot themselves with guns every year, by whatever means possible, seems like a worthy goal to me. I suggested legalization of physician assisted death, but obviously that's not the only means of reducing gun suicides. Another, maybe less controversial way, would be to put more resources into counseling for people with depression or to fund more suicide prevention hotlines.
You're missing your own point (net positive benefit to society).
If a person truly is a candidate for assisted suicide, which I would hope they are literally suffering on their death bed, those aren't the people shooting themselves.
If a person is able to function well enough to get a gun and pull a trigger don't you think their life is worth trying to save? I would hope so, otherwise your value of human life is shockingly low.
Doc, I had a bad day at work...I think its time you put me down for the count. OK, step into my office.
For what it's worth, I found my best friend's dad swinging from the rafters in a barn. It was awful. I won't ever forget it. Even friends and family who didn't find him won't ever forget it. But it wouldn't have been any better had I given the man a hug and said goodbye as he walked into a Dr's office. If you've experienced suicide up close and personal, you're not going to be convinced that it was good idea.
I've watched others wither and die from hopelessly incurable cancer. I don't have a problem with them giving up the fight and letting death come, but putting down a human like an animal is never going to be a good idea.
As for what happens to the guns after they die, probably the same thing that happens to every other gun that resides in the home of someone recently deceased. The successfully suicidal are probably a tiny fraction of gun owners. If this is your concern, you should be mortified by all the orphaned guns from people who die from cancer, heart disease, and car accidents.
TLDR, assisted suicide has a net negative impact on society.