Puberty blockers are evil. They used to give it to older men to suppress prostate tumors, and the old men disliked the side effects so much that they refused to take it, preferring to risk prostate cancer. Then they started using it to chemically castrate sex offenders, but I think they don't do that much because it's hugely controversial. Then they started using it to suppress precocious puberty, and the side effects ended up crippling the victims physically and mentally resulting in a massive lawsuit. We have decades of research on GnRH agonists by now and they are indeed a powerful drug that should not be taken lightly. A person who receives a Lupron implant turns into a walking biohazard, they aren't supposed to shower, swim, or exert themselves physically for 48 hours because their sweat is toxic; their laundry needs to be kept separate from everyone else's because the laundry water might be too toxic after touching clothes that touched the patient.
But for some reason they will insist until they're blue in the face that GnRH agonists are safe and reversible. Fucking with hormone levels was already dangerous for people whose bodies weren't already supposed to be navigating a delicate hormone rebalancing act (prepubescent children and older men), but somehow we're supposed to believe that magical gender souls will keep pubescent teenagers safe when subjected to this poison? SRS surgeons are bad, endocrinologists who give cross-sex hormones to teens are worse, but the doctors who prescribe hormone blockers to children are fucking evil.