Quote Originally Posted by Niwashi View Post
Can I try to veer this conversation a bit more towards the original topic by pointing out that, in a world like Eorzea, where physical transition is as easy as drinking a potion before you go to bed, it would be far less of a disruption and far less of an issue than it is IRL. In a world where Fantasia exists, and people can be whatever gender they want to be, nobody's going to be stuck in the "wrong" type of body, so it would be safe to assume everyone's body-type gender is their correct one.

Which leaves the only people the request applies to being those who don't (or rather whose characters' don't) have an emotional/mental gender at all, and see themselves as truly genderless. It's a different issue, and I believe a far less common one, than being trans.
Fantasia is not an actual item in lore. It has flavor text because everything requires flavor text. See: http://nunhofthat.tumblr.com/post/12...ck-im-in-japan Specifically:

1. Would a regular average joe in Eorzea be able to get their hands on a Fantasia potion, it does not appear to be widespread as it is. And if so, is there a reason why it does not appear to be used by people in power/ people with evil agendas?

A: While the Fantasia potion has some in-world flavor text, it’s mainly meant to be seen as a meta object. For example, you wouldn’t see it’s use, or reference to its use in storylines since in effect it doesn’t actually exist (… So far. You never know if something might change :P)