"Puberty blockers" don't merely delay puberty, it derails it and dosen't resume normally after.

The lowered bone density isn't unfucked once the drugs are stopped. Kids put on chemical castration drugs "puberty blockers" have their IQ stagnate or decrease during an age other kids IQ increases.

The argument that it helps kids be more socially-adjusted during the year or two they were the only one starting puberty and felt akward isn't worth permanently damaging them.