My argument is that the discussion around the nature of sex is irrelevant to promoting transphobia. The far right (English-language or otherwise) will find something else to latch on to.

Yes and no. I transitioned 8 years ago. Before the current wave of transphobia had settled on us for politcal gain. And transphobes were around then. The same arguments were around then. However, the only people who used those arguments and the only time those discussions came up, was when transphobes were talking about trans folk. What wasn't happening then, was regular folk, unconnected to the trans and gender diverse community, weighing on on what their opinions on sex and gender were. Mostly, folk didn't even distinguish between sex and gender.

What has changed since then, is the politics. And yeah, the politicians didn't come up with these arguments out of thing air. They didn't create the transphobia. But what they did was popularise and normalise it, and that is the reason that a Ukranian is arguing with an Australian, about the actions of a transphobic American.

The fact that you (and I) are having this conversation, or that you're even aware of the topic enough to have strong opinions on it, is absolutely shaped by the transphobic political environment around the world.

Forget Ukraine, what about say Pakistan or India or Uzbekistan?

That's the point I was making! You're talking about sex using absolutes. I'm saying there are no absolutes. Sex has multiple definitions, some are cultural, some are physical, some are genetic, some are medical, some are legal. And they all overlap, and they often contradict each other. There is no clear cut definition of sex that can apply a consistent standard. The cultural contexts you highlight are actively a part of the reason that is so!

You are welcome to disagree with me and say I am wrong in my understanding of the binary nature of sex. It is what is. I am just trying to show you that my worldview has a level of nuance and it's not a mere matter of wanting "neat solutions" while ignoring the weaponization of this discussion by the English-speaking far right.

To be honest, your reasons don't matter. What matters is that you are parroting the arguments actively used by the transphobic folk, in a time when trans folk are facing ever growing abuse. The fact that you think you have good reasons for holding those opinions doesn't change the fact that in this environment, choosing to share those opinions, especially in the context of arguing with folk actively pushing back against transphobia, isn't harmless.