Just because you're from Wyoming doesn't mean you HAVE to be stupid. (I spent a lot of time in Colorado.)
How about basing a theory that gun owners are irresponsible on the observed facts that people are irresponsible and gun owners are people? Aristotle would have had no problem with that one, and he didn't even know what a gun was.
Or to put it another way -- what about owning a gun is supposed to make a person magically more responsible than the rest of humanity?
And, yes, I have had firearms training, and I have spent time at both rifle and pistol ranges. Which doesn't mean that I don't recognize that some of my fellow students are and were idiots.
This is a problem of perspective. People are irresponsible. So what? That's always been true. That means they shouldn't be allowed to have things that they can hurt themselves and others with?
Alcohol is dangerous, people shouldn't have that. Drugs are dangerous, people shouldn't have those. Guns are dangerous, people shouldn't have those. Cars are dangerous, people shouldn't have those. Knives/swords/axes are dangerous, people shouldn't have those.
Does that follow? No, of course not. It's silly, and a 'straw man'. But it is the heart of the argument is it not?
How about we look at it another way. Someone said that cars are needed, but they are not. If everyone paid the government what they now pay for their own cars, we could have a massive public transportation system with buses, rail, and professional drivers. This would be far safer than our current system as professionals are safer, and drinking would obviously be a reduced problem. Cars are more dangerous than guns, so shouldn't we do this before we start on guns? Hell, even just increasing our standards for licensing and requiring re-testing every ten years would have a marked increase in safety. Why aren't people campaigning for this? They drive cars. Sure, it is easy to ask other people to give up a right they enjoy in the name of safety, but not something you personally enjoy.
How about another thing, swords are illegal here. I'm a martial artist, practicing kendo. Technically, I shouldn't own the swords that I do, because people are scared of them, and someone thinks that they are 'unneeded'. Well an ax takes far less training to kill someone easily with, yet they aren't illegal. Why? More people use axes.
Some more perspective? As I said, I'm a martial artist (not a professional one), and my kick has a force of almost one ton. I'm a big, strong guy, and could in all likelihood kill several people with my bare hands before being stopped if I were so inclined. Does that mean we make every guy with sufficient strength wear restraints in public? Another straw man? Hell yes, but one that is almost as reasonable based on the 'dangerous' line of reasoning.
All this fear of guns is just silly. Ask the people in Iraq what is more dangerous, a gun, a bomb, or a car?
Now I'm all for reasonable gun laws such as required safety and training courses, but there is so much gun law based on nothing but fear (like banning guns that 'look' like assault rifles) that it sickens me. And it is hard for fairly reasonable gun owners because they have gun bans on one side, and the NRA on the other. I can't join the NRA because, frankly, they're fairly insane.