Speaking this as a spouse of a medical doctor -- case reports are sometimes a good way to increase the bullet point count in your CV if you are a medical resident. A lot of residents do that just for the sake of beefing up their CVs (to apply for fellowship for example).
In vet med, case studies are still pretty important, but that's because vet med is in its infancy compared to human medicine. At least one case study, usually two, are required to be eligible to take boards. Future board renewals, I think for most boards, are "published one original piece of research or two case studies" among a slew of other requirements.
I don't see anything wrong with that by itself; with the amount of patients doctors see there should be one once in a while that is worth reporting. Or are such cases so rare that the doctor is incentivized to lie?