I actually gave a de-gendered draft of the essay to some friends a few days ago and heard that it landed with a thud — the essay is largely written about myself, in the third person, retrospectively, so removing the pronoun made the autobiographical thread harder to follow. I switched it to "he" to make that clearer.
I think if I used "she" it would've made the "That kid was me" transition harder — it would either involve some gymnastics to make it make sense or it would introduce a reading I didn't intend.