Motivations matter. Rowling is the kind of commie lunatic who demands her right to free expression at the same time she demands you be silenced. Here she is reducing the complex issue of gender politics down to the simplest of Marxist terminology. She opposes trannification not because she's concerned for the welfare of children or committed to biological realism, but because she hates men and resents the idea that they can escape their staus as oppressors by choosing to become women.