I think we need another name for so called conversion therapy as it applies to transperson. We're playing by Stonewall's rules, it makes it easier to conflait with gay conversion therapy. Like, 'you're not trans, and, even if you are, you won't be by the time I've finished with you'. But, as I understand it, this is not the therapy being proposed for transpeople.
How about 'confirmation therapy'. As in let's confirm this is really what you want/need. It's close enough to 'affirmation' but different enough to keep everyone on board