@ajroach42 People use this same kind of fatalism/binary fallacy when it comes to privacy & security as well: "I can't completely secure myself so why bother." It's motivated reasoning. They don't want to have to care, so they grasp for a reason not to. The actual excuse they pick is not that relevant, and convincing them their reason is bullshit won't change their mind. They'll just come up with a different excuse.
So I'd just ignore the excuse entirely and point out that they're doing something that directly benefits not just a transphobe but a high-profile transphobe who has done significant harm to trans people.