How is calling transgender women "not women" "well established and reasonable"? Whether you intended to parrot what I said to be so snide, this is quite disrespectful.
Reasonable: see the above. Also, implied by the users of the term itself. If a T.W. is a W., why do they say T.W.?
If a human female is a human, why do we say human female? Because it adds additional, usually relevant, context.