What I didn't expect in the aftermath of my cancellation was the avalanche of emails and letters that came showering down upon me, the overwhelming m… - J.K. Rowling

The last thing I want to say is this. I haven't written this essay in the hope that anybody will get out a violin for me, not even a teeny-weeny one. I'm extraordinarily fortunate; I'm a survivor, certainly not a victim.

"Seventeen, eh!" said Hagrid as he accepted a bucket-sized glass of wine from Fred.
"Six years to the day we met, Harry, d’yeh remember it?"
"Vaguely," said Harry, grinning up at him. "Didn’t you smash down the front door, give Dudley a pig’s tail, and tell me I was a wizard?"
"I forge’ the details," Hagrid chortled.

'Cis' is ideological language, signifying belief in the unfalsifiable concept of gender identity. You have a perfect right to believe in unprovable essences that may or may not match the sexed body, but the rest of us have a right to disagree, and to refuse to adopt your jargon.