Um, it looks like that guy is looking for book sales.
That's not to say that some do regret transition but you're also never going to see post-op success stories there either so it's quite one-sided.
Things like that are the reason standards of care exist and mental health checks are required.
Even for me to get HRT my letter had to state something to the effect that I don't demonstrate [list of things] that would impair me from making this decision.