I don't rightly know where to start surmizing too much. If this really is some sort of "test group" for them, could be that they're looking for how people with certain skills and backgrounds react to things, in addition to whatever genetic lottery it seems that they're doing. Seems like we've had one of a lot of things around here at one point or another. One nurse, one fireman, one musician, one therapist, one cop. Maybe the rest of us just have something a little less obvious about us along those lines.