Someone motivated purely by money will usually be chasing the field after the fact, whereas those that truly love something will likely have been practicing and

Someone motivated purely by money will usually be chasing the field after the fact, whereas those that truly love something will likely have been practicing and gaining information and skills in the area for a much longer period of time with greater concentration. It naturally follows that the later entrants will be, on average, of inferior quality. Not in all cases, but probably most.