Ah, I didn't know those were a thing. ^^;
Well, I will try and salvage my position by saying that although benign sex-changing magic exists in D&D, the Girdle is probably better-known and more iconic, and that it's probably a D&D player's first introduction to such within the game.
And it does portray sex-change as something snuck upon the player that they want to get rid of as soon as possible, also as something lulzy.