

I think it’s probably more analogous than you are painting it as. The trans community suffers elevated levels of suicide risk, and parents who are in the dark about what their child is going through are less equipped to get them the help they need if they need it. Parents of trans kids often have to get them emergency mental health services due to them being bullied or ostracized. If the parents are kept in the dark about it, they may not see the problem until it is too late.
And I agree that children aren’t property, but they also aren’t fully independent agents. Children need guidance. Children need to be raised by parents who love them and are involved in steering them to be a successful and active participant in society. Children should not be allowed to make every decision for themselves without question. They need to be required by an authority figure to eat their vegetables and brush their teeth.
They have agency certainly, but not unlimited agency, and we need to figure out what the left and right bounds of that agency are. And that will change as they age and get older, and will be different from child to child even. But who decides that? My gut is that it’s the parents. I feel like every other option is unpalatable.

It’s not an easy decision. You are taking it on face value that the child is right. I have seen many children afraid to tell their parents something that they think will upset them, only for the parents to be totally cool with it. It’s very common.
Now, if you truly believe that the child is right, I do think there’s still a moral difference between not telling the parents and actively lying to them if they ask.
If asked, I think that probably the correctest decision is probably to refuse to answer and tell the parents that’s a conversation they need to have with their child? Idk.
I’ve seen a scenario where the parents were actively beating their kid if he got good grades because they wanted their kid to fail out. Should the school have lied to the parents about what grades he was getting? CPS refused to remove the kid from the home. What should the school have done in that scenario?
Ultimately, I think navigating when and how the state intervenes in parenting is tricky. It’s very case by case, and in most scenarios there aren’t really good answers. What’s the line where kids are taken away? What’s the line where the courts mandate training or intervention in the home? What’s the line where the state starts just actively lying to the parents about their child to protect them? If you’ve crossed the lying line, why haven’t you crossed the removal line?
I don’t know that there’s a good answer to a lot of these questions. But in general, I think that the state hiding things is usually the wrong answer.