Making the shot has a lot to do with muscle memory . Back tension is accomplished with muscle memory. Proper practice makes for consistent shooting, and consistency is the key, anchor , position on the grip, etc. It doesent matter what you are shooting primitive or not. Back tension is an archery thing period. So many have an effective range under 20 yds with trad gear. The gear is not the limiting factor. Younger and older shooters will benefit from back tension. Everyones shoulders will benefit from using it. So much garbage is spread on the net about form. Go to a class on form by an accomplshed archer and you will be taught back tension . It doesent matter if you are shooting game or foam. The execution of the shot is the same and can not be rushed, I.e. snap shooting. I highly doubt that trad or primitive gear is more forgiving than compounds, just the opposite. Tuning and form are more critical in my experience.
Glad you can hit what you shoot at. Different ways to accomplish the same goal. Some better and safer than others. You have to decide for youself and form your own opinion.
Jeff