If you ascribe to the "Disney is full of male pedophiles" theory then it makes sense.

Showing attractive, naked men to children will make a small percentage of them want to "experiment" with men. The straight pedophiles get the oversexualized girls, the gay pedophiles get the oversexualized and sexually confused boys.

Showing attractive, naked women to children will make them want to experiment with women, which does nothing for an industry that's still mostly male.

This is why public school is so intent on Drag Queen Story Hour being ubiquitous. It's obviously sexualized, but the drag queens appear to be female to the children, and public schools are overwhelmingly ran by women. It's never Drag King Story Hour or Frumpy Sweater-Wearing Lesbian Story Hour for a reason.

And if you're asking "why not just use actual attractive women to groom children", take a look at your average female pedophile and you'll have your answer.