What Iused2BanOptimist and FekkoThe Penguin said.
Why couldn't the child's parents say, "That's alright darling, you can be what you like when you're older. It's nothing to worry about now, you're still growing". Then change subject.
There's too much talk about this sort of thing, no wonder little kids are confused.
Parents, too, are obviously influenced by various organisations and news reports. After they've taken what are usually irrevocable decisions, they have to stick with them and justify them.
I didn't think puberty blockers were available in this country though.