Sure, I plan to educate my son on how to handle a gun safely, but that doesn't mean that I am not going take measures to prevent him from making a deadly mistake before he has reached the age of reason. I am not talking about locking my guns away and hoping he doesn't discover them. I am talking about securing my guns so that he doesn't accidently hurt himself or someone else.
Let's be sure to recognize that there is a lot of middle ground between Massachusetts storage laws and leaning a gun against the wall in an area where children play.
My point is your defiintion of "the age of reason" and mine, or MA's, or the Brady Bunch's, are different, and I'm not interested in you (or MA, or the Brady Bunch) asserting your definition on my kids.
Comments like yours seem to overlook the fact that many (most? all?) of us grew up in homes with loaded firearms, and without trigger locks and storage laws. Somehow, we made it through, and did the many generations before us.