You haven't read what she actually wrote, have you?
It's almost as if you already had a 'JKR-response' all primed and ready, and actually reading, absorbing and understanding what she actually wrote would be a waste of time.
Note that anyone is free to read, absorb and understand what JKR wrote, and then disagree with it, argue against it, critique it.
But superficial reflex negative responses which don't engage with the actual text as written don't carry much weight .