OK, I accept that you read it; but your response didn't engage with what it actually said, you just expressed your low opinion of JKR.
Your low opinion of JKR and a rational argument against the points she makes could co-exist, you know.
You went for the easy option, the low-opinion-of-JKR option.
Fair enough, that's your choice, but it doesn't so much miss the point, as ignore the point completely.
It would be interesting to read a rebuttal of the things JKR wrote for a change, rather than predictable negative statements about the woman herself.