If you are a potential consumer of a commercial product, you get to have opinions about the product - why you will or won't buy it, and how well its marketing strategy works for you.
A fashion magazine is a commercial product, and its cover is a marketing strategy.
As people have already said, we can debate long and hard about what every cover means - but turn the page, and everything is aimed at selling overpriced products that nobody needs.
The cover - the face of Vogue - might change its expression from time to time, but the heart of Vogue never skips a beat, with month after month of advertising, designed to incentivise levels of spending/consumption that wouldn't be regarded as average. Everything else in the world of magazines is secondary to the spend.
We're all aware of how companies have used sex to sell things. At other times, advertising has almost approached art in its sophistication. The current method is manipulating social conscience as a way of persuading people to feel good about spending their money in a certain direction, but bad about doing it in some other direction.
Every part of the media relies upon you taking things at face value, and if questions arise, that you can be shamed out of discussing the multiple agendas present in every calculated move.