Here's your choice as I see it.
One fine day you could find yourself at the scene of a "Shooting" unarmed and hoping that 911 gets there in time.
OR you could find yourself at the scene of a "Gunfight" someone who intends to shoot people but instead is faced with armed resistance, you can be part of that armed resistance if you choose.
I'd rather be in any gunfight where at least some of the people with guns are on my side and I would rather be an asset than a bystander or victim.
I think this is what the 2nd Ammendment means.