Players need to work on each mechanical movement separately before shooting from one foot. After practicing from one foot, they then need to practice shooting in game-type situations. Working at all three levels yields permanent, not temporary, shooting improvement. If shooting were even partly mental, then regular psychiatric visits would help. These are some of the myths passed down from one generation of coaches to the next and from coaches to their players.
None make sense, and most importantly, none help.
If basketball were viewed as a fun, learning, and healthy activity for kids, not entertainment for fans, these myths would be more obvious. If coaching was viewed as teaching, not an ego trip involving beating other teams, then every coach at every level would have interest in the basics of the game.