Question

I am attaching here a post that shocked me. I recommend reading it, even though the style is a bit irritating, because her frustration is the frustration of many.
In any case, for the sake of brevity, here’s the short version (I’m summarizing her words, and adding my own comments in square brackets):
Background
On the mako website, a case was published about a child who decided at age 5 that he was a girl, and his parents are raising him as transgender.
 
Claim A
The accusation is hypocrisy — people are shocked when 15-year-old girls have consensual sex (and planned it — they forged ID cards) with soccer players, but they are not shocked when people get involved in bodily changes for a 9-year-old child, with serious effects. [From a quick Google search, I don’t know about this specific case, but in America it is common to give such children puberty blockers, meaning substances that delay sexual development during puberty.] That is, to say: a child has the authority to decide to undergo far-reaching bodily changes, but not to decide whom to sleep with.

Claim B
There are two possibilities: either sex is connected to gender, or it isn’t. If it is, then the child’s gender is the sex with which he was born, and don’t interfere. If it isn’t, then he can be a “girl” (in terms of gender) even without being a girl (physically), because physiology has no real connection to gender perception, and again, don’t interfere.

The rest of the claims
Are less interesting to me, because they revolve around whether this is “natural” or not, and how it affects the chances of reproduction.
What do you think about Claims A and B? And in general, about the right of parents to raise a child in accordance with his “inclination” (I’m not even sure that this word belongs here — playing with Barbies doesn’t really say anything about identity).
https://galibathorin.com/2020/06/20/%d7%90%d7%95%d7%9e%d7%a5-%d7%96%d7%94-%d7%90%d7%9b%d7%9f-%d7%9e%d7%94-%d7%a9%d7%a0%d7%93%d7%a8%d7%a9-%d7%a2%d7%9b%d7%a9%d7%99%d7%95-%d7%95%d7%9e%d7%99%d7%93/