I've been to those churches before and it really doesn't work. Many in those churches have a covering but it isn't of the Lord. It is a tradition of men and religion that drives it and well, it can be seen. You'll have women wearing skirts and blouses so tight that it leaves nothing at all to the imagination. You can see their panty lines. Same with some men. They look like they are straight out of an 80s rock video with the skin-tight jeans. Then they got their shirts tucked in to make sure they give all us gals a good show.
Truth is modesty is all in the heart. If you are not a modest person you can make anything unmodest. I would rather wear my above-the-knee skirts and modest pants/shorts than put on a show at church to try to get attention in a skin-tight-fitting skirt or dress. While thinking I'm hiding my intentions from the Lord.
So I guess that's the answer...God sees our hearts and knows our intentions.
PS...My dad always said that men with little weak puny arms come up with the rule that men can only wear long sleeves. He said they were jealous of other men and embarrassed to show their own arms...lol