The author thought that perhaps being trans is considered such a bad condition that it's easier to conceive of oneself as an animal rather than as a gender other than the one you were assigned, and that eggs were trying to sublimate their gender dysphoria as a "animal dysphoria" as a way to deal with it.

I actually wanted to mention something similar to this angle but I forgot, like its some sort of trauma response. Generally it seems better to confront them / nudge them towards the idea that they need to do something about the gender dysphoria then, no? Assuming they have symptoms of course

But fundamentally I still think this assumes otherkin/furry stuff is not gender related, but can be a thing to sort of cover yourself with