Look, I happen to think that the strict male/female taxonomy is horribly messed up and inadequate. It doesn't account for me, so I no longer recognize it as valid. I'm clearly not the only one.
Other people can use whatever system they like, but I think it's horribly presumptuous to apply it to someone else who doesn't accept it. And to tell another person that he's delusional for finding and applying a system that DOES work.
If you like the M/F classification system, with all of its flaws and lacunae, I'm happy for you. It's wonderful to be able to work within a system that already exists and that is already accepted by the vast majority. But that taxonomy has only brought me grief, so I now reject it. I'm still trying to find a better way to look at myself, but the classic medical/legal definitions just don't work for me--or for a lot of people. So I reserve the right to redefine the terms. Not for others but for me. I realize that a personal taxonomy has no medical or legal validity, but I'm not using it for that. I'm using it for self-definition. Please respect that.
Weirdly enough, I'm starting to think of sex classification the same way I view religion. After all, both of them are constructed by humans and are not inherently "natural." If you worship a zucchini and I worship the Flying Spaghetti Monster, I have no business telling you that you're wrong for not believing what I believe. Similarly, if a trans guy redefines his terms so that he has a male body, regardless of how it's configured, he can do that. It might be confusing that he uses existing terminology, but we're talking about self-definition here. You found what works for you, and someone else has found what works for him. Someday I'll find what works for me. But it won't be the medical establishment's classic M/F scheme. It leaves out too many people, and it leaves out me.