"Just for example, I've seen a plane flown. It doesn't mean I'm going to go rent a plane and just get in the cockpit and just start flying. I think everyone would agree that is just ridiculous for me to think I could do. Even knowing how to drive a car, I know I should not get in a bus or semi and attempt to drive it without proper training."
This is the part that makes my brain hurt. Most people who have no gun experience don't have any idea how complex gun use can be, so treating these examples as parallel is unfair. I agree that people who do know are wise to step in as soon as they see a situation like someone who owns a gun not knowing how to load a magazine, but acting like the guy is being as dumb as someone who would try to fly a plane without practice is condescending. Nobody is born knowing this stuff, and the major danger in firearms is that they're easy to use so the danger isn't readily obvious to the untrained. The first time a friend of mine took me to a shooting range (which was the first time I ever fired a gun) I made some seriously dangerous rookie mistakes (mostly violating rule number three, not paying close attention to where the pistol was pointed and not setting the safety when I should have), and I had no idea I was doing it. I was just lucky enough to be in the presence of someone who knew better and who was willing to help me. I wasn't too dumb to handle a firearm, just unfamiliar with it and unaware of the safety rules. I'd love to see a rule that forbids someone from buying a firearm until they've passed a basic safety course, but in the absence of that rule it's just a matter of a rookie not realizing the danger.