No, I am saying that greater availability of firearms is correlated with greater number of deaths caused by guns. Lower availability of firearms is correlated with lower number of deaths by guns. Not the same thing.
"If not, the same (actually, slightly higher) level of violence will be achieved by other means."
No. A country that is otherwise much more peaceful and has less crime (Switzerland) has many more gun-related deaths and also has more guns available than another (Germany, UK).
"It would be smarter to think what could prevent the next accident, but who I am to give advice to experts? After all, those are probably the same experts that make men dressed in uniforms grab my balls and feel my ass each time I fly, for the benefit of my security of course. Nobody can argue with this level of expertise."
Nope, not at all the same experts. You are talking about the TSA, I am talking about the FAA, NTSB and related. I am certain they would appreciate your thoughtful input.