I would agree with his suggestion Perhaps we should leave the Second Amendment alone and deal as best we can with an apparently inviolable right of the physically fit of military age to have guns. What I can't understand is why the author doesn't seem to buy into his own conclusion.
Why do you want to take guns away from the elderly or infirm?
Grandma needs her guns as much as the next guy.
You're just not thinking this thing through. We let Granny keep her guns, how on earth are we gonna rob her?