Actually, it's your assertion - that sex is mutable, that males can turn into females (in humans) - that is extraordinary, and so it's your assertion that must be supported by equally extraordinary evidence.
My assertion? Where have I asserted this?
I have said repeatedly on this thread that I don't believe it's possible to change sex biologically. I do not believe sex is mutable and have never believed this.
All I am asking for, all I have ever asked for on this thread, is that courtesy be shown to those who identify as a gender other than their natal one, by not misgendering them.
But, no, you want to revel in a bullying pile-on to anyone who dares to disagree in the slightest particular with your narrative.
This may be an overuse of abbreviations, but I feel it to be sufficiently apposite to be justified - RTFT, FFS!