This discussion has nothing to do with modesty. For purposes of this discussion, let's assume that everyone wants to wear modest clothing.
Call me unnaturally objective, but I noticed years ago just how objectively vain female clothing is.
Let's put it this way: what if a man could wear, for church or the office, any type of pants which weren't made of jean material: parachute pants (think: MC Hammer), khakis, suit pants, etc. And let's further imagine what if men's pants could be LITERALLY ANY COLOR IN THE RAINBOW and then some, and not even necessarily monochrome -- all kinds of patterns, stripes, swirls could be used.
In other words, what if the male dress code was similar to the female dress code? The female dress code for Church or office is basically: anything goes, as long as it covers adequately and isn't obviously casual. No jean material, tears in the material, see-through material, slogans, graphics, etc.
Consider the fact that women are encouraged to show off a significant portion of their legs. Even if the skirt was well below the knee, that still leaves quite a bit of leg showing! I couldn't imagine going in to the office or church with any part of my bare legs showing. It would be completely socially unacceptable.
And then there's the arms! Women, even in an office setting, often have arms completely exposed, or have short 2-3" sleeves. You can see their whole bicep (or lack thereof). Now I'm all for short-sleeved shirts; workmen often wear sleeves only to the elbow. But female dress seldom goes anywhere close to covering to the elbow. It is often sleeveless or has token "sleevelets" which don't cover much of the arm.
Along these same lines, the fact that women show off ANYTHING below the neck, or any portion of their shoulders, more than what men would show in a similar setting, is silly as well. Again, I'm not talking about modesty here.
The styles of tops, bottoms, etc. is limited only by the collective imagination of what the fashion industry has produced in the past 100 years. But for men, everything is pretty standard. White/off-white/beige/tan/olive green/dark blue/grey/brown/black slacks, and a button-down shirt (which is always the same style -- never any lace, ruffles, or anything else to make it unique) and a tie. And all ties have the same shape. Ties are about the only outlet for "creativity" or "individuality" for a man.
And don't get me started on Jєωelry! Men only wear a wedding ring. End of list. Women wear baubles on their hands, ears, wrists, neck, etc. which adds even more to the vanity.
And then there's hairstyle!
And let's not forget "accessories" -- hats, sashes, veils, ribbons, lace, sequins, decorative buttons, and other non-functional items added to the clothing.
Watching an episode of Quantum Leap where Sam "leaps" into a female subject really illustrates the double-standard society has for mens' and womens' clothing.