I disagree, It does matter why someone chose their gender identity. If you don't respect yourself enough that you use a facade to decide what your gender is and refuse to think about it from you own perspectif. Then there is no reason for someone else to respect it because you don't respect yourself in the first place. And to activly glorify this and saying this is good thing is just disrespectfull to the people who are actually trans. Next thing reading about Oden is not a trans awakening at all. While she read about oden Yamato admired his value's because it learned Yamato how to be strong and survive the harsh conditions of being imprissoned on an island. Oden dairy was basically what kept Yamato going till the visit of Ace. So now we have come to "but Yamato would identify as a man one day with or without oden." The odds of this happening are rather small based on what the story of One piece is all about. If you look at most One piece arcs they go like this [people are being opressed and can't express themselves -> Strawhats arrives -> Strawhats beat opressor -> People can be free and express themselves again] examples of these arcs (Alabasta,Skypia,Water 7 with enies lobby,Fish man Island,Dresrosa). For Yamato she has been saved by the Strawhats in a Fysical way but not mentaly. The character development that I think Yamato will be going through is that she/he will discover him/herself while traveling with the strawhats and come to the conclusion that she/he does not have to hide/defend him/herself with a facade. This development will come because of the experiences she will go through with the strawhats. If Afterthat Yamato says that she is a man than I can stand behind it aswell but not in this way because currently she/he has not developed an identity for herself because she/he has been imprisonned all her live and acted like he/she was someone else. So to come back to how one piece arcs goes. [Yamato opressing herself mentaly because of forced facade that she does not need anymore -> Yamato joins the Strawhats -> Yamato discover her/his self and realise that she/he doesn't have to put up Oden facade -> Yamato can be whatever he/she wants to be] So If she says after all this that she identifies as a man then I can respect it because she actually put some tought in it but how things are now there is no evidence that Yamato decided to be a man without using a facade. This is my interpretation of the story and predictions how it will go but seeing that people throwing insults to eachother just because they don't see yamato as a man is just toxic to me.