It may or may not be true, but the sentence is grammatically correct.
Thanks dear 5jj. Due to some L1 interference, perhaps, I keep thinking that, 'most doctors' handwritings are illegible' and I can't help it! :(
Or maybe the problem is native speakers don't see this structure as their first option or so.
I think there is a course in most medical schools titled "Illegible Prescription Writing 101"
They've cancelled that class because now the majority of prescriptions are computer-generated. Most clinical notes are also now typed, either directly by the doctor, or dictated and typed. Personally, I think it's a complete waste of a talent that many doctors have put much time into perfecting.