Does this mean that anyone in favour of proper licensing and use of cars needs to know all about cars? And anyone calling for controls on drunk driving needs to understand all the physiology and psychology of driving drunk?
Because people look at the effects on society of improper vehicle ownership, and improper drinking, and want social rules so that car ownership, and drinking, are not abused. They don't need to know the itty bitty details.
When people dismiss gun control advocates because they don't know all the technicalities, what they are also dismissing is the concerns for proper social use of guns. Not just the proper ownership of guns, but what their proper use is in terms of society.
People who want good socially responsible gun controls will leave the technical details to the experts if they think the overall goals are being respected. When they know the overall goals are being ignored they start worrying about the technical details, and often getting them wrong. If a certain kind of gun is popular with people who do mass shootings, can you blame gun control advocates for thinking that maybe this is a gun that needs better controls?
I don't need to know the ins and outs of various guns any more than I need to know the ins and outs of various vehicles. I do need to know that vehicles will be owned and driven responsibly, and I need to know that guns will be owned and used responsibly. This includes all the details, so for example, that people changing their own car oil don't dump the used oil in a drain going to a watershed, and gun owners control ammunition as well as the gun.
So when I see pro-gun advocates getting all fussy about the details, the message I get is that they are so focused on the guns that they are ignoring the overall effects on society. Because just as we worry about the nut behind the wheel, we worry about the nut holding the gun. Which is where things like delays for purchasing, registries, mental health and violence checks, and other ways to actually assess if someone should own a gun come in. Did I really care exactly what rifles my former farming neighbours were using to shoot coyotes? No. Did I care that they had taken the gun safety course, knew when and where it was safe to use it and where it was not safe to use it? Yes. Do I care that checks fail and then we end up with domestic violence cases like the man who killed 3 women in Renfrew County? Yes. But I also care that because usually the system works, there are relatively few cases like the Renfrew County one (and yes you can find it with Google).
And of course someone who wants to kill people can use a gun, a knife, a baseball bat, a car, whatever. But guns are designed to kill people, and make it easy to kill people, or otherwise soldiers would be armed with knives, baseball bats and cars.