I am not limiting it to attractive women, that is just the example I used. I think that extrapolating the idea to attractive men, to unattractive people in skimpy outfits, and so on makes sense.
Advertising is designed to attract your attention and convince you to do something.
Individuals, by and large (and, obviously with exceptions - working out, dieting, cosmetic work, etc.) cannot control what they look like. Even with those exceptions, they have absolutely zero control over what other people may find attractive or unattractive about their bodies. What is simply a comfy outfit that one individual chose to wear might be deemed "skimpy" or sexy by you but not by others.
They're wildly different things, and the assumption that just because some skin is showing means that someone's trying to get you to look at them is also incorrect.