... oversized traps is an artifact of Okinawan jar (kami) training. Interestingly enough, by today's modern weight training and bodybuilding standards, the physiques of old school Uechi Ryu would be considered lacking in symmetry. Modern training equipment allows for better balance of strength development, leading to better performance and lower injury rates.
The movement (not a shoulder roll) has a specific purpose, not for demonstrations..Modern training equipment has nothing to do with learning the movement or why its used....
Instead of speculating, why not visit Toyama Sensei and ask him?
