Yeah, guys turning into girls randomly to balance the global population of men and women, that's totally fine, but doing that via a cocoon is JUST TOO FAR dude, TOO FAR.
Like, seriously, why are so many people acting like this is the most insane thing they've ever seen. Cocoons are already a biological construct used by other creatures to transform from one form into another, so it's not that strange for it to be used for this esoteric gender transformation. Like, they've gotta transform somehow, right?