The BEST training program in the entire world will be a DISMAL FAILURE if people fail to hold up their end of the deal. The success of ANY training program is ultimately the trainee's responsibility.
If a program of physical activity isn't designed to get you stronger or faster or better conditioned by producing a specific stress to which a specific desirable adaptation can occur, you don't get to call it training. It's just exercise.
Big arms are fun, and if their training doesn't interfere with the rest of the program, wait till everybody's gone, like I do.
Start training yourself. You don't have to have been an elite lifter to be a good coach - I sure as hell wasn't. But you have to at least have been under the bar enough to know why wedon't look up at the bleeding ceiling when we squat!