because it sound better than unemployed :P
It's a bit like when people claim there is a god. They like to believe in fairy tales.
Same reason they say they're demon hunters, werewolves, vampires or anything else like that. Everyone wants there to be something special about them. There typically isn't anything. So, they make things up. Most of them are teenagers.
Freeze vampier shadowcasters, you have no place left to hide.
they just want to say it