You're right. One thing we have been discussing recently in my hs group has been modest clothing and fashion. One of the biggest issues is the showing skin, and it's not whether you're wearing a dress or jeans.
The moms in the group desire to dress their children (daughters specifically) modestly in shirts that don't raise up (when you raise your arms) to show their bellies or more. They don't want their children wearing the hip-huggers that have come back into fashion because they, again, show their bellies (and backsides). The argument is that those types of pants would be ~okay~ if there were kids-sized shirts their children could wear that were long enough to cover the skin.
An issue I have is what some of the guys wear: low jeans with boxers showing, taking their shirts off to show lower abdomenal hair, etc. Some are of the belief that girls have no visual temptation challenges. Not true. Modesty goes both ways.