I once heard a recording of an elderly lady calling in to a radio station.
She said, "With today's dress standards, I can't tell who the hookers are."
Sad but true.
Catholics need to become more active in the clothing industry. That way, there would be choices for people.
A lot of times, you'll see a young woman wearing tight jeans and a loose top. If you watch, (and I'm not suggesting anything untoward) but you will notice many times her hands pull down on her short to cover her bottom. Even though this activity generally achieves very little in modesty, I am inclined to believe at least subconsciously, that that young woman may buy more modest clothes if they were available.
I'm not excusing anything due to availability because modesty is mostly smirked at in the non-trad communities.