I mean you can say that, but the article is littered with evidence that you're mistaken. Yes, puberty blockers definitely change things. I think if we were just talking about children who hadn't gone through male puberty then the question would be far simpler. I certainly wouldn't have taken the time to write this article. But we're clearly not talking about that. As you say, in under 18 sport, girls are being asked to complete against trans girls whose bodies are absolutely identical to male bodies. This is obviously unfair.

It's also important to be clear that sex isn't assigned at birth, it's observed. The same way that eye colour or the number of fingers and toes is observed. Again, this imprecise language makes it more difficult to talk about these issues clearly and honestly.

Gender identity can't be observed at all of course, and may well not match the sex of the person concerned. I think we agree that we should respect those gender identities. But women are in serious trouble if we indulge them to the point where one group infringes on another. There's clear evidence of that happening here.

As somebody eloquently put it recently; identities don't compete in sports. Bodies do. Surely it's also devastating for girls to have to compete in sports where they know that they have an unfair disadvantage, no? I must admit, I'm surprised that your empathy doesn't extend to females in the same way it extends to trans girls.