They weren’t separated just because sperm and egg. Female and male bodies are so obviously different ...

These "differences" are the result of "sperm" and "egg" coming together to form a zygote though. Once upon a time, there were no organisms that had vaginas or penises. Gametes started forming and differentiating. Limbs, and genitals didn't pop out of nowhere on their own.

even if two males and two females can reproduce together- there’s still two sexes. It’s ridiculous that you’re pretending this isn’t the case.

You think it's ridiculous because you think "female" and "male" are separate from gametes ... they aren't. If "sperm" and "egg" weren't the only things capable of creating a zygote, then there would be no "differences" between "males" and "females".

That two "sperm" or two "eggs" can do the exact same thing a "sperm" and "egg" do though makes this blurry. It goes to show whatever "difference" exists between a "male" and "female" is arbitrary, and could easily occur between two "females" or two "males", because two "eggs" or two "sperms" can do the same thing a "sperm" and "egg" do.

Which would mean that their spectrum is worthless and irrelevant to the rest of us. If they want to measure transness on a spectrum go for it, but they’d still be the sex they were born on any other spectrum when compared to the rest of the world’s population- which was my point. There’s no way to make transwomen women with females and transmen men with males. It can only be done if we isolate them. Because there’s the common denominator of biology/chromosomes, even if we accepted a spectrum that accounts for intersex conditions. It only makes sense to measure sex based on what connects the most people. And inevitably it’s gonna come down to those pesky chromosomes.

They want most people to change everything for them. Why do they call most people "cis"? They make most people use a language that validates their "gender identity", whatever it is. They make them think they have a "gender identity" too, and then they claimed "sex is a spectrum" and "actually, sex doesn't exist at all, it's man-made and a social construct".