By default, everyone’s a guy on the internet unless stated otherwise. Some people just know the name and that they’re a powermod and not much else. Also, they’re apparently trans or claims to be, so there’s a subset of people who’d misgender them on purpose.
The simple fact that untreated rabies is almost 100% fatal means that the vaccine is worth it. Not many diseases are almost 100% fatal, and at least this one’s preventable if caught.