Again what do you base this on? I got a concealed carry permit after a 2 hour training class. During this class I had to fire a total of 6 rounds at a target ~15 feet away. I was not given any training on how to use the weapon, only a primer on the laws about when I can shoot someone. At no time did I have to demonstrate that I could safely bring my weapon from concealment to ready without shooting myself in the leg or a bystander. I can guarantee that of the 20 other people in my class, most of them did not meet any definition of "well trained".
"However the people who actually do that tend to be enthusiasts who are well trained" - based on what? You can buy a gun even if you have never fired one before.
Thirty percent of U.S. adults say they personally own a gun, while a larger percentage, 43%, report living in a gun household. - "https://news.gallup.com/poll/264932/percentage-americans-own...
Is your argument that 43% of US households consist of well trained enthusiasts and the this is a small number?