Because in other places, there are way fewer effective methods of suicide, so people are scared into staying alive and suffering. Guns provide an almost sure way of ending your life, which is I think a way humane thing to do than forcing people to stay alive and suffer.

does owning the gun do this? always flip the coin.

tryout elevated suicidal ideation partialy presents as possesion/purchase of a handgun. kick that about in thought, if it seems stable that can be considered a perihypothesis