Good for you, Justicia!
I am in agreement with dressing nicely to show respect for the setting one will be in, but I always asked for proof that this means skirts and dresses for women! Many women look so much sharper in slacks suits. Some have a physical reasosn for wearing them, such as legs sensitive to cold from poor circulation, diabetes, or varicose veins that they are self conscious about. Does any of this matter to the MEN who insist they must put on a dress and be miserable? No! I was always told to wear a dress due to "community standards." Well, Hello! In many communities, it is the norm now to see women in pants, and skirts have become the exception.
The real issue is dressing nicely to attend meetings. This should not preclude the wearing oif "nice" pantsiuts if the sister chooses.
Once, when I was about 18, I put on a navy pin-striped pantsuit and went up to my elder dad. "Dad, do I look sharp in this?" (Yes, very sharp! You look nice!)
"Do I look dressed up and neat in appearance?" (Yes, very dressy outfit; what's the occasion?)
"Can I wear this to the Hall Sunday?" (Haha, no! You can't wear pants to the Hall!)
"Why not? Where does it say that? I'm neat, sharp and dressed up, you said so!" (Never got a solid answer; just, you can't wear pants to the Hal.l