"Trans women are women" only makes sense if you don't really believe it, as Matt Walsh's "What is a Woman?" shows. Why do the trannies wear long hair and dresses? What does that have to do using the sound "wuh-man" to describe yourself, if being female has nothing to do with it?
It's the same with fiat "money".
The Hegellians take some phenomenon and redefine it to include other things which sort of look like the original thing. This makes the definition meaningless (what is a dollar? a piece of paper? why should I work all day for them? everyone else does... really? why?) but relies on people implicitly using the old definition.