Someone having "grown up around guns" is no guarantee that he (or she) has learned all, or even some, of it.
True enough and something we should all keep in mind when around those who are using complex and potentially dangerous equipment with (unknown to us) levels of skill.
My only point was that my feelings were bruised
by the implication that someone having "grown up around guns" is a guarantee of ignorance and stupidity.
I think, like "enough money", there's no such thing as "enough training". No one is so skilled that nothing more can be gained or trained.
It's just counterproductive for any of us to denigrate those we think have need of more.