Let us stop playing their games..
No matter how much they mutilate their genitals, no matter much much they pump themselves with hormones, no matter how much they cry, scream, and abuse others,
they will always truly be the gender they were born as. Sex is not on a spectrum. It is determined by the chromosomes one is born with.
There is no such thing as "trans-gender" people; only transvestites.
Let's call a spade a spade.
Yes, vestire is Latin for clothes, so transvestites are cross dressers. But OP still has a point that trannies are “wearing” fake tits and dicks as if the parts are clothes.
I think a reason that ‘tranny’ is unPC is because it was earlier used as short for transvestite. Also partly because it’s whimsical and dismissive. But it is funny to bring back transvestite and have the trannies think you’re confusing them for cross dressers.