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I mean, in Japanese or Chinese, you could easily get away without specifying a gender -- in fact, pronouns in general are used rarely -- instead of "I go to school", you say "go to school". By inference, it's clear who the subject is. You get used to it.
However, in English and many other languages, there is no commonly accepted, gender-neutral pronoun. Facebook isn't to blame if our language hasn't evolved to embrace transgender individuals. I'm sympathetic to this awkward situation, but presumably transgender users face this every day.