For clarity, here is a visual comparison.
The current male Midlander body appears bulky even in minimal gear, while the same character only achieves a more elegant silhouette when constrained by very specific glamours.
A 2nd slimmer body type option would allow elegant glamours to look natural, not forced.
And yes, I know that a body type similar to Omega-M wouldn’t look truly “natural” in reality.
But FFXIV is a fantasy game, and we all want our characters to look good in different glamours and overall, don’t we? :3