However, she is trying to sell something that is impossible - opposite sex puberty.
There's still enough headwind in general public understanding to think that this is possible. It even gets talked about from "GC" talking points - for example, some people talk about how unfair it would be to allow trans(identifying) female athletes taking testosterone into women's sports because they "go through a male puberty".
Also the Olympics debacle highlights how easy it is to convince enough people to feel confused about whether an athlete with 46 XY 5-ARD is a male with a DSD or a female with a DSD.
All of this confusion leaves enough space for enough people to think that a female who takes testosterone is "going through male puberty" by getting a beard and a deep voice, and a male who takes oestrogen is "going through female puberty" by growing breast tissue.