Trans ideology has two ways to get to TWAW. One way being that woman is a social role linked, but not mapped exactly, to sex, the other way is more transhuman - that sex can be altered through surgery and drugs.
So socially, TW fit into the WI because their social experience matches that of women in the group. The medical pathway says that if science can allow an infertile women to conceive and give birth, its only a matter of time before TW can too. Therefore sex doesnt exist, even if at this time the idea of a man giving birth is theoretical.
I think activists claim that TW will be excluded from society - employment, housing, healthcare, on boards, because we are ignoring these social and medical pathways, forcing TW to hide from society?