The dress you describe is practically teenage girl uniform these days and it breaks my heart.
I blame TikTok and the endless stream of girls and women dancing in 20-30 second clips putting their bodies on display as the only way to garner attention from boys and men. The ones with the "hottest bodies" and "best make-up" score far more followers and subscribers to their OF (OnlyFans) pages. The race to be TikTok-famous or go viral is all encompassing for far too many...and they are all willing to essentially perform as exotic dancers to a nameless, faceless gaggle of mostly male perverts.
The end result is less and less clothing, more and more sexualization and far more body dysmorphia and angst than just 10 years ago when my oldest daughter was the same age as her sisters. I don't have an answer to this as sex sells, period. My problem with it is that these are young girls, beneath the legal age of consent in many cases, and they are performing like street prostitutes searching for the next john in many cases.
Prohibition and taking away access points is futile - all of their friends are also into this - if not TikTok then definitely Instagram. Today's youth live their lives in a fantasy digital space and are also very under-developed in face-to-face communication and interactions. Its getting frightening when you also account for how social media is destroying democracy and journalism at the same time it is hypersexualizing inexperienced and immature girls at the same time.