Woman disguise as man - plot that I can't get into.

Yeahh I know it's just fiction but I can't get pass the beauty visual of a woman and them fighting/winning big time when their frame are the smallest among all the characters😭😭

Usually I don't really used logic while watching drama but for this case, I can't help but think why people don't know they're women when their whole body scream WOMAN. Plus Cdrama actresses visual are mostly that kind of flowers and soft visual. They don't really have that ambiguous/androgynous beauty that can help with viewer's immersion.