Arthur,
I have no doubt that those of us who are not technologically impaired are capable of putting together some impressive groups through instinctive shooting. However, the amount of time needed to become affective in that method is very prohibitive to the average archer/bowhunter today. But for you retired folks.....
Sorry for being too long-winded on my reiteration of your explanation. Sometimes I just need to put it into my own words to understand the concept thoroughly.
So, basically, the craze for speed is to blame for many of current archery shortcomings....