Most advice, to be useful, should be easy to remember. This article falls under the heading "There is no (lasting) freedom without responsibility" and contains many of the rules one should know and follow for gun ownership and use.
I grew up in a home in which, like the one described in the above article, "guns were taken for granted, almost like furniture". I was taught all the rules and mostly followed them except that one day shortly after my sixteenth birthday I shot myself accidently (straight through the abdomen, front to back, luckily missing my spine) with an "unloaded gun". The bullet was a ".22 short", one of the smallest pieces of lead you can shoot out of a gun and I mended quickly.
Many stories would take a turn here, with the teller saying that the accident turned them off guns, or made them anti-gun. What it taught me was not to be a smart-a$$ who thought he knew it all, and to follow the rules from then on (Rule #1: Treat all guns as if they are loaded). I continued hunting as soon as I was up and around again. I am 61 now, and I do not currently own a gun, but am an NRA member and emphatically retain the right to own a gun for self-defense. I am no longer interested in hunting, but I understand as well as the rest of you that that is not what the 2nd amendment is about anyway.
While negligent discharges are always possible and potentially deadly, the solutions proposed are even more dangerous and potentially deadly.
There is no mechanical substitute for mental conditioning and training.