CM has always been a gifted, funny, interesting writer. But she has her limitations, one of which is a tendency to generalise from her own experience. When I read excerpts from her book on men, she seemed to be under the illusion that previous feminists had never thought about, let alone written about, male experiences or the harm done to men by socialisation and gendered upbringing. I think you really see that limitation in her take, or lack of it, on the trans issue. Despite her impoverished start in life, she knows she's never going to share a prison cell with a rapist or need to escape from an abusive partner in a domestic violence refuge. So she can afford not to take a stance on the issue.
When I look at women like her, it makes me admire the bravery of JKR all the more.