I have been a LE firearms instructor since 1971. Throughout the years I have been astounded at the lack of knowledge, or ingrained wrong knowledge, among new armed professionals and civilians alike. Misperceptions about the laws governing use of force, weapons safety, and gun handling are legion. Some of those misperceptions can get you in jail, negligence can get somebody killed. And yes, some of those misperceptions were perpetuated by uninformed "instructors".
We all have a duty to educate those around us at a minimum about safe gun handling and we darn sure need to inform ourselves about the laws on the use of firearms.
Not too many years ago previous generations grew up in rural settings and were familiar with firearms. Many served in one of the two world wars, Vietnam, or Korea, or served in the peacetime militry, and had training of some kind. Things are different nowadays than with our ancestors, as only 1% of the population have ever served in military service and most were not raised in a rural setting.
The responsible thing for a new gun owner to do is to seek out training but too few will.
I have to admit that, although I agree with constitutional carry, I am a little uneasy about folks with zero training walking around with a gun on them. Their inappropriate use, or negligent discharge could impact people I care about.