I travel to Amsterdam regularly for business, this is precisely what the girls in the windows wear, how on earth is it sexist to acknowledge that some women sell sex and wear exactly this kind of clothes to do so? If they were stood there in their fluffy PJs I am not sure they would get the same interest! Ot it would be incredibly niche if they did.
It is kind of ridiculous to say that wearing the same dresses that strippers and sex workers use to attract custom will be somehow different on a child, that somehow it is more acceptable on a teenager. Sadly I am not sure the average man or boy is that thoughtful, they just see what they see, and make their own deductions. You can't single handedly change the though processes and biological responses that a man has! As much as you might like to.
I also fundamentally disagree that women are respected whatever they wear, I sincerely wish that was true, but it is not flissypaps there is such a thing as unconscious bias. Most people will form an opinion of another person within seconds and it is wishful thinking to imagine otherwise.
In fantasyland we can all skip around naked or with hardly anything on, and we would be perfectly safe and everyone would respect us, no, back in the real world that would either see us in a prison cell or best case scenario there would be some raised eyebrows and maybe some kindly person would put a cardigan over our shoulders.
I strongly suspect you are defending this dress because you allow your own young teenagers to go out in stuff like this. It is up to you (and them) I have teens too, and I am very relaxed about what they wear to a point but honestly I will not paying for or encouraging them to go out semi naked. I want them to be equal to the fully clothed boys that they meet, not already massively disadvantaged by being half dressed from the get go. I want the people around them to listen to what they are saying, they are intelligent, articulate girls that don't need to reduce themselves to teetering around half naked. I think it is a crying bloody shame that women and girls are still thinking this is any way cool or aspirational to be honest.