The height was for body fat %, not ideal weight. Obviously the idea of an "ideal weight" is kind of bs, because it doesn't take muscle mass vs fat vs bone density vs water weight, etc etc etc into consideration. Take two guys that are 200 lbs, same height/age/etc. One has 5% bodyfat one has 30% body fat. I'm thinking one of those is a lot more "optimum" than the other.