Thank you for your reply.
You haven't actually answered though.
You've said people are different, but not what the difference is between girls and boys that means we need, or can even apply, different words, nor what it is that is the same enough between girls and girls or boys and boys that it makes sense to share a word.
So I'll try again.
Genuinely, what does "boy" or "man" even mean to you?
Why in your view do these words even need to exist at all? What's the actual, meaningful difference between the people who are "boys and men" and the people who are "girls and women"?
What do you consider that your child has in common with male bodied people that makes the word "boy" or "man" appropriate for both the majority of those people and your child?
When you agree that your child is a "boy" what are you saying about all the other people in the world who are also "boys"?
When you agree that your child is not a "girl", what are you saying about all the other people in the world who are "girls"?
If "people are all different" why can some be grouped as "boys and men" while others are "girls and women"? Are there actually no differences between them? And if so, why does it matter so much to "come out" or "use the right pronouns" or "just get to pee (under exactly the right label?)"
If sex and gender are different (and I certainly do agree with that) why does gender take the names, and with it the resources and the history, of the sexes at all? Surely that sinple choice is saying that the people who name themselves "trans girl", "trans boy" see themselves as having something in common with the sex whose name they take?
What is the connection between the sex of a, to use the language of your faith, "cis" boy and the gender of a "trans" boy such that Genderists like yourself consider both to be types of "boy"?
Why does this connection somehow determine how the body should be treated in sports, privacy etc even though the body sex is different?
Because despite your prejudices about the people who question you, I do not dismiss trans and non binary people's experiences at all. What I dismiss the language they use to describe it.
I do not believe a trans "boy" is in reality any sort of a "boy" at all. I do not believe she is any more like a "boy" than any person of her sex. I believe she is describing a genuine feeling but has got the wrong end of the stick about what that feeling means, projecting her own ideas of "boyhood" onto herself and others as if they were an objective truth when the reality is they are just her own projections echoing back at her in her own head.
I believe trans people have unconsciously projected onto sex - yes, sex - a whole load of their own prejudices about who belongs in which body.
And while these prejudices are usually along sexist lines because that's the culture we all grow up in, they don't have to align with traditional sexism at all, because they are the personal prejudices of the individual based on their own experiences and triggers).
What links them is not the exact shape but the act of using the binary fact sex differences as a metaphor for the mind's self expression and calling it "gender".
That is why "gender" can mean anything and nothing, because it's as individual as the person projecting it. And that is why travs women are not women in any meaningful sense, nor trans boys boys. Certainly not in any sense that matters when it comes to our common language, rights, history or. political voice
So if you think it's more than that, if your assertion is that trans people are not just describing their genuine personal belief that they are a "boy" or "girl" but that there is an actual empirical quality that makes them so, a genuine attribute shared by most male people and also found in trans men and boys, then you need to name and describe it. Because until then, trans "son" notwithstanding, my hypothesis fits the facts better than yours
We may not agree exactly when blonde becomes brunette but we all know the difference between very blonde and very dark. We have stable meanings with fuzzy edges, not no meaning at all.
So while you do not have to answer me, wthout answers it is very hard to believe there is anything real here at all, simply the prejudices of trans people about others accepted too readily, then a lot of waffle to try and justify it retrospectively.
Some people think they are clever to say "just because you can't understand something doesn't mean it isn't real".
But really clever people can say "I know there's something here I can't see, something I don't understand, but I can still learn about it by observing what it effects and how. And I can still test whether the claims made about it are consistent and logical.
I do not need to know what something is to know what something is to know what it is not.
So far I see nothing in what you have said to support what you claim to be true.