An interesting distinction just occurred to me. Feel free to shoot it down.

"Pleats" may not be the issue. Many women's skirts are pleated. I wonder if a "real" kilt (whatever that is ) could be characterised with deep pleats as opposed to pleats that are really quite shallow and only meant to give some visual interest to the garment.

Deep pleats allow for vigorous movement, such as running and leaping because they can open out as necessary.

Your turn...