So have most of the people who have never taken a training class. They have gone out with fathers, brothers, friends, or received advice (good or bad) from other people on the ranage. Almost no one does this in a vacuum.
Point taken. My father taught me to shoot and coached me through 3 national championships and 2 national records. I did not receive any formal marksmanship training until college and that was still a shooter/coach relationship.