As in, they do not attempt to give individualized prescriptions. What's a phrase or word that characterizes this tendency?
If a doctor gives all his patients the same prescription, there are only two possibilities: either all their patients have the same disease and need the same treatment, which is a coincidence, or it's just charlatanism or quackery. If the treatment does any harm, then it's also malpractice. The term you are looking for may be "a ready-made prescription".
- "Dr X seems to have ready-made prescriptions. All his patients are on Aspirin and Atorvastatin."
It can also be used in other contexts: "I'm sorry but we don't have a ready-made presciption to beat inflation."