Suppose ol’ Joe Biden felt suicidal.
If he were to swallow a bullet, no one would care. There’s plenty more where that guy came from.
But suppose that in addition the mean bastard decided that he wanted to take all of us to hell with him. He could easily accomplish that by starting a nuclear war.
Over many decades this eventuality becomes increasingly more probable.
And that’s one of the many reasons for every country unilaterally to disarm.