I’m a provider at a children’s hospital. I specialize in orthopedics and rehabilitation, so I mostly deal with the musculoskeletal system. I have colleagues who would be able to provide a much better and more in depth explanation, but I will do my best.
Even in orthopedics “hormone blockers” are used fairly frequently. For example the same drugs that people use to transition are utilized to moderate the epiphyseal fusion of growth plates. Puberty is also frequently delayed to moderate the hormone levels of juvenile cancer patients. Or even more increasingly common, to halt the symptoms of precocious puberty in young women.
The vast majority of juveniles prescribed hormones to delay puberty are for non gender affirming care like cancer. The problem with moderating what medical providers can and can’t treat is that you are assuming you know more about medicine than the a person who went to medical school.
You may be trying to protect kids, but what ends up happening is an interference of medical care, and usually not the type you intended. If hormone drugs become more monitored, providers may be hesitant, or have a more difficult brine prescribing it.
The dangers of delaying puberty are very small, when you stop the prescription puberty begins again. Usually the only side effect is excessive growth due to a delay if epiphyseal fusion. In regards to gender affirming care, I will remind people that their providers are looking at total outcomes. Meaning they are factoring in things like the higher potentiality of self harm and suicide.