I was grocery shopping today and came across boxes of "Cracker Jill" in the store. They were "celebrating women in sports". I googled it when I got home and it appears their mascot is a transgender man in a wheelchair: https://www.crackerjill.com
It's rather wearisome seeing every single human being that's not a straight white man being constantly honored for something or another. I'm not a ConPro-type, but that's only the demographic responsible for 99% of modern technology and society.
So, very apt then. It's literally Jack pretending to be Jill.
So Jack jacked being Jill, and probably jacks to being Jill, but will never be able to jill as a jacked Jill becase Jack "becoming" Jill jacks everything up.