Have you tried it? I have and so has a future Hall of Famer and a major league pitcher with 26 years in the league and we all agree that it is the best lower half mechanic training device there is.
Most major league pitchers do have the same foot path to the plate. They just look different doing it.
What the balancer does is make the pitcher stay back, stay on line and have a consistent delivery. You do lead with the hip but the foot has to be on a consistent line to the plate.