I think you have perhaps misinterpreted what’s been said. The point is to highlight that what defines the culturally defined beauty ideals are the traits of the healthiest from the day. That will of course include weird quirks, like wealth, but the point of this article is about physiological, so slim versus curvy.

So, for the ancient cultures who lived near glaciers, the body shapes idealised were of larger women because they were the healthiest of the day, and so they became idealised. In the modern world, its slim women with curves in the right places.

Though I disagree with your point that the genetic cues haven’t changed much, in the short term that will be true, but over the course of human history, I would imagine they have changed quite a bit, at least in evolutionary terms. For example, the cognitive revolution is believed to have only happened 50,000 years ago, so imagine how that alone would have affected the mates we chose, so the birth of verbal cues for mate selection.

Thanks for the comment, Burton!