Now we can "what if?" this to death. If you and an atheist were attacked by a murderer, would you rather defend the nonbeliever from death so that they might have time to receive faith, or stand by meekly knowing their eternal destination?
What if, what if, what if...we can invent scenarios for anything.
And again, you have not given any proof that gunowners spend more time than any other group worrying about death. Does your purchase of car insurance mean that your quality of life is impacted by worrying about auto accidents? Of course not.