Forcing Tsubaki to be transfem is not the progressive, "better", or more "politically correct" reading you think it is
I'm genuinely tired of people trying to canonically rewrite or force Tsubaki to be a trans female when he's explicitly written to be gender non-conforming, comfortable with what is traditionally seen as feminine, and open with expressing himself without conforming to rigid masculinity in Japan.
Making him a trans female is not the queer activism you think it is. Tsubaki is comfortable being a gender non-conforming man. Erasing his identity by forcing him to be a trans girl defeats his entire message of how men can be comfortable in their own bodies, even if they enjoy things not associated with their societal gender. I don't think making Tsubaki go to an all-boys school if he IDs as a trans female is any good writing either.
Forcing him to be transfem also completely erases the meaning of this scene:
They never say that lipstick is a "girl's thing", that makeup is a "girl's thing", that liking "cute and pretty things" (paraphrasing) is a "girl's thing". Because that's the whole point! Things you like don't need to be gendered! You like what you like, you can be what you are and break gender norms, you are your identity and nobody can take that expression from you. That's the fucking essence of being queer!
"Why do I like this? Normal boys don't like it" / "CUZ YOU'RE A GIRL!!!!" <- this is not the fucking progressivism you think it is!!! You are forcing him into the gender binary of being a female when he sees himself as a queer, gender non-conforming gay man!!!!
He doesn't see himself as a woman. He still accepts that he loves Umemiya. He is comfortable with both his sexuality and gender expression.
Tsubaki literally says he likes "cute and pretty" things, not "girly and feminine" things. He doesn't gender what is traditionally and societally framed as "feminine" because he isn't bound by the hierarchy of gender expectations.
People always say they want more gender non-conforming characters, that they want more men who are comfortable with traditionally feminine attire, but y'all couldn't even respect Tsubaki's identity and the outlying existence of Japan's otokonoko culture as a whole 🥸 Quoting Niisato's interview isn't a cop-out to be openly transphobic. Insisting Tsubaki is transfem does more queer erasure to his character as a gnc and openly gay man.
Like, sure, after you're done reading this and you still insist he's transfem, it means no matter what people say you're not going to change your mind, so go ahead with the queerphobia lol. Speaking as someone who's transneu and genderqueer myself, trans and gnc experience come hand in hand, I understand why people would read him like that even though it blatantly goes against what is established as his character, but I digress. But that doesn't excuse taking away Tsubaki's defiance of labels. That doesn't justify calling Niisato's writing of Tsubaki as a censored version of transness, or a refusal to commit to writing a trans character.
Tsubaki is an intentional and well-written character, he expresses everything he wants to express. He isn't a 'half-assed trans character' that Niisato didn't commit to, he is who he presents as on the tin: gnc, queer, and gay.
"He wants people to call him big sis" -> the whole concept of drag culture is tossed out of the window, I guess. And I suppose genderqueer people don't exist anymore. Anyone can do drag, but plenty of cisgender & queer men also don a drag queen/hyperfeminine identity when dressed up. That doesn't make them any less of a man. That doesn't make them a trans woman. You can also call girl 'dude, bro' and boys 'girlie'... does that change their gender? No lol 🥸
Western fandom has a serious problem of erasing people who present as gender non-conforming by forcing them to fit the binary of male/female. It's like the inverse of toxic masculinity: "this male/female character likes feminine/masculine things, so he/she must be a girl/boy!" <- how is this progressive? How is this better writing for Tsubaki? How is forcing him into another rigid box good for his character?
Let Tsubaki be a gay and genderqueer man, omfg. Gendering the things he likes into 'girly' and by default making him transfem is just an assassination of his character.
There's plenty of transfem anime characters out there that deserve your love. But Tsubaki—and on that note, all the otokonoko characters out there—are men who aren't restricted by the tight binary of gendered items/hobbies.
For the love of media literacy, please accept that men can be men while liking (unnecessarily-gendered) 'feminine' things, and in that vein, it's not that you like "girl's stuff" as a man—you like it because you like it.
Make-up, clothing, sparkly things, and long hair aren't gendered as 'feminine' to Tsubaki, even if he accepts that it is traditionally liked by girls. He likes it and that is it. That is final. He likes it so he wears it, he is honest and true to who he wants to be.