You didn't know it because it is not true.
There is zero evidence that puberty blockers "lock in" transgender identity. Puberty blockers weren't invented for trans kids. They were invented for cis kids who are going through precocious puberty (sometimes as young as six) to delay it. Once you stop taking them, unless you add gender affirming hormones, you go through natal sex puberty just fine. They've been used for this since 1993 in the U.S. and longer elsewhere. While using them for trans kids is relatively recent, these things have been around long enough that if they made somebody trans...
Oh, and there are plenty of trans people who never took them.
Also, being trans isn't a bad thing. We MAKE it a bad thing, but it isn't.
The Satanic Ritual Abuse thing WAS a scare. This isn't, isn't remotely comparable.
Please stop posting misinformation to try and sell your book on my posts.