KEEP IT SIMPLE
It appears what the author is saying in “The Knockdown Myth” is that some hunters attempt to make up for a lack of skill with a lighter caliber by using a heavier one. This is a self-defeating method, as it leads to more recoil and a bigger bang, which in turn leads to a fear of shooting, flinching, nervousness, and rushing the shot.
The only thing I know to help prevent these is frequent shooting practice and frequent hunting experiences. Some of us need more of this than others. Some animals must simply be hunted with larger calibers, so go to the range and practice with a firearm you can handle.
Happy Myles via outdoorlife.com