When I'm writing a higher level scenario I tend to have a concept and then other than any specific "dungeons" I just write scenes, or detail locations. Let the players use their spells and abilities to determine the path. Maybe consider that as a concept.
ChatGTP is the same almost. It's programming has become silly restrictive. You can't do pictures depicting even fake people in a photo realistic quality without complaining that it might make a resemblance to someone real. As you were saying, some outfits on female pictures it won't do because...
From about the age of 9 I wanted to play D&D but my first was Warhammer Fantasy Roleplay in early 1987, which was closely followed by the BECMI D&D box sets. So Basic D&D was the my second.
I've played D&D since 1st edition, although we skipped 4th for Pathfinder 1st. I've moved back to D&D with the 2024 edition because I've grown tired of heavy mechanical systems. 5th has the mechanical options to keep players interested but isn't so intensive or overpowered that I can't run...
Unfortunately it's the default imagery. We definately need more variety. If we can do it in our games, then the art should follow suit.
My favourite Tiefling PC was a Fighter, who in appearance was a big mass of humanoid tentacles in a hessian sack.