I think its better to assume that those characters actually do have Catches, but that they are simply 'unknown' -- possibly because Jim Butcher didn't want to publish the information, or because Evil Hat wanted to leave some unique NPC's Catches up to individual GMs to create as a pleasant surprise for their players. The characters in OW often have too few aspects, rarely have Troubles, etc -- this is not an invitation for player characters to follow suit "because if it's good enough for Evil Hat, it's good enough for my PC".