A vagina is a birth canal. It is a specialised organ. It joins the womb to the exterior world. It is self lubricating, it has its own micro biology, and can stretch to accommodate the passage of a baby during childbirth.
It is made out of completely different tissue to a “neo-vagina”(inverted penile tissue or colon) which is a dead end cavity that must be dilated to prevent it from healing up.
The neo-vagina is a cosmetic surgical construction; it has none of the natural functions of an actual vagina.
Except from the male perspective, you could stick a penis in it, so it presumably affords some validation to its owner. But some men will stick penis’s in almost any hole to see what happens.
A real woman’s vagina is so much more than a receptacle for a penis. But I guess if you are male, you might not have any comprehension of the vagina beyond penis receptacle. Hence transwomen think that’s all there is to it.
Male ignorance of our female reality. Sad really.