I think the article's claim is that bigotry against appearances is so strong that it uses up people's ability to keep an open mind on any other topic of discussion. Which is to say, we live in a world at the moment where when someone meets a transgender person, much of the time the only challenging topics they can think about are transgender related: for example they will have trouble concentrating on arguments concerning cryogenics.
Not to say this is a good or fair thing. But if true, it is a data point to keep in mind and maybe even fix.
So the suggested remedy concerning appearances, has to be re-thought in some cases.