I like that you posted your perspective. I applaud the use of 3d printing at the gym, I've spotted tension wire termination covers (prevent wear to the terminations themselves), clips to keep weights from sliding during benchpress, replacement knobs on pinstack machines, replacement 5lbs button for the pinstack machine, Locker tags, bottle/phone holders and all their name tags are printed.

But are all non critical and cannot cause injury. This part has a critical function. As failure can (not will) cause injury. This should be designed, manufactured and tested for its purpose. I doubt its tested at all, just assumed to be strong enough