I can tell you the idea behind it provided you don't take this as an endorsement from me. They supposedly believe that enbies are using the trans struggle to distance themselves from oppressor identity markers. The concept is that predatory men will use their adopted trans status to shutdown any conversation about their privilege and as a shield for their toxic beliefs. Essentially, they think people are claiming the enby identity in bad faith.

I think there is a kernel of truth to it. I don't doubt that there are reactionaries who will attempt to take advantage of this "new" identity marker to distract from their oppressor traits, but ultimately, so what? There is no way to identify them short of reading their diaries or something, and we can call them out for being shitty people without questioning whether they've fully internalized the identity they claim. It takes almost zero extra effort to avoid misgendering someone while dunking on them.