Fashion models are supposed to be walking clothes-racks. The bodies of young men are actually better suited for this than the bodies of almost all healthy women.
The use of men in fashion marketing may be healthy, emphasizing the fact that normal women are never going to look like the models and shouldn’t try.
I’m no fashion expert, so I can’t figure out why clothes meant to be worn by women should look better on men.
If the fashions they design are not going to look good on their real female customers, then what’s the point?