Regan,
I can really understand the point you're making. I have considered it myself, very seriously.
The process isn't about society simply accepting the occasional child who is transgender. The process is about breaking down the gender norms that separate people.
But it goes deeper than that. Those that rant that boys should dress as boys, really need to say how boys should dress. Pink was once a perfectly acceptable colour for boys. If tradition is what we're aiming for, lets all dress in smocks and wait to be whiped by our feudal overloards.
But it goes deeper than that. It's about the freedom for each of us to express ourselves. If a boy wants to have his hair long, or a girl wants to wear jeans, then there needs to be a better reason than norms to say they can't.
But it goes deeper than that. Let's assume that this child, grows up and decides they want to be a male, after all. Why should they feel in any way disturbed or upset about their previous declaration? What exactly is so demeaning about being a girl that, later they need to be ashamed of it?
But still it goes deeper. Having been a transgender child who was frustrated by her environment, (not a complaint against the environment, conformity was essential, I wasn't popular enough to be different), I can say, without fear of contradiction, that children know who they are. This little girl knows who she is.
Assuming, for a moment, that this child's desire to be female, is borne out of some psychological trauma, in early age. Is that a reason to frustrate it or dismiss it as irrelevant?
That opens the question, is it acceptable to psychoanalyse any behaviour we fancy? We can psychoanalyse men who like sport, to rid them of their obscession.
This is a dangerous path, based upon dangerous assumptions.