I agree: this chart does have a lot of flaws. For one thing, it doesn't take into account different body shapes, even broadly general ones like the Mesomorph, Ectomorph and Endomorph divisions. And of course there's the fact that a lot of the subjects are wearing loose clothing that obscures their outlines to an extent, and some lack of height referents, etc..

But then again, I still consider it better than the standard height-weight tables, as it does give a general idea of what a person at a given height-weight looks like.