What I “conceded” was merely that it was reasonable for JKR to have concerns, given that some transitioned people later regret or revert their decision — and given the possibility that people can often overcome gender dysphoria without transitioning.
Given this situation, it is reasonable, I think, to be concerned that some people “may” have felt pressured into a premature decision.
That’s not the same thing at all as conceding that they were pressured into making their decision.
I don’t personally believe that JKR is actually a transphobe. I think she just has some way to go to think through these issues properly. But you are of course entitled to a different opinion.