I heard at one time that designers were allowed to ask for models they wanted.
I notice still, there are always too few Petite models. I only see Crystal, Meredith and Taliafia (?). I also notice when modeling tops and bottoms, they are a poor fit, with pants dragging and tops that look long and tunic like making it look like no legs.
Average woman 5'4" and 130 or 140 pounds. We should see a lot of models with those dimensions, not so few.
I agree, when the models don't look good in the clothes, I just think they will look worse on me. I like models to look good, fit and healthy. Make the clothes look good. When they look good, many will think they might look that good, too.