Interested to know where you heard that there are people in the hold pool without the requirements for a ZFTT course? Meeting these requirements through either minimum hours or sectors was needed to apply, as I'm certain you are aware, so it would surprise me if this was the case. Besides the requirements aren't that demanding, especially the sector requirement.
Although all of the DEPs come with previous commercial experience and thus can do a ZFT course, we also have plenty of men and women joining from the forces in the hold pool, along with the FPP cadets, all of whom need to do base training.