What's so wrong with a damsel in distress? Are you saying there aren't any females out there that would like rescued by valiant fighting men? I think as long as ALL females aren't depicted this way its fine (also have female warriors, wizards, thief etc...). Variety my friend. My wife very much likes the strong man type and the idea of chivalry so I know some women like that idea.I think this is the thing right here: 5th Edition has done a good job of broadening the depiction of female character types. Of course there is room for the femme fatale and the busty warrior woman, but there is also room for the armored knight and the practical sorceress and the demure priestess. Likewise male figures, but males have always had a much higher variety of common archetypes compared to females in fantasy art.
I can't think of any damsels in distress in the art off the top of my head, which is a very good thing.
(All that said, I love me some sexy fantasy art and in my head D&D is always illustrated by Frazetta, but I don't think for a second all D&D art should look like that; fantasy is the broadest genre of all.)