Surgery doesn't happen for little kids. If you find an example it is so rare as to be the same as never.There's still so little known about gender dysphoria. There's a link between GD and schizophrenia, there's a link between GD and autism, there's a link between GD and depression. I'd say let's find out the root causes that leads to GD before we advocate for surgery on little kids(!) and pumping them full of all sorts of cocktails of medication.
When there is almost certainly an issue, then after very lengthy consultation, puberty blockers are often used to delay puberty until someone is old enough to make more permanent decisions.
I have no idea what this cocktail of all sorts of medications is that you speak of. That isn't at all what happens.
https://www.mayoclinic.org/diseases...horia/in-depth/pubertal-blockers/art-20459075
Not only does this hugely reduce mental harm but it reduces physical harm for those who later choose to undergo surgery, as it is far less invasive in most cases. Bear in mind that surgery is far from a universal choice anyway.
Doing nothing because you personally (the royal you) aren't comfortable or undertand it all is an unethical way to proceed medically, as it doesn't consider the best interests of the patient.
Most of controversy about the medical side of this is driven by religious and far right ideology that plays on people's natural concern for kids. But it ignores the needs and welfare of people with gender identity issues.
And all this is probably far better discussed in the other thread as it is getting away from trans sport issues.