My daughters have been taught that clothes are first to cover the body, second to keep the body warm, and third to decorate the body. The clothes in that poster (or lack thereof) do none of that.
And no, I would not let my daughter go to a place of prayer dressed like that!
Not bad lessons, a little bland but basic.
Kids should know how to read popular culture. Look at the ad. Famous model against what appeal to be what's called "seamless" in photography. Grease marker lines of the type used by an ad exec or fashion editor. So the message is: This is what goes on behind the scenes of a fashion shoot. Models wear these jeans. But, of course, the look behind the scenes is as fake as the slickest ad.