I'd be curious to know how much time the student spent in the pool beforehand, and if there were any extenuating circumstances leading to those bare-minimum OW dives? Rockstar who spent 6 evenings in the pool who got in, got down, did the skills, and showed proficiency but did short dives because the water was borderline uncomfortable in the shop's 7mm rental suit is a different thing than a weekend-wonder who barely did skills to standards and cut every dive short because of near panic.
Heck, sometimes we're certifying students who already have more dives that we do, but are doing the course again because they've been out of the water a while, or are coming from a commercial or military background.
It shouldn't be the norm, or even common, but it doesn't mean that there aren't circumstances where it's acceptable.