True-ish, at least if you're not a good people wrangler. And it depends on the setting. The paramedics cop it the worst, followed by the nurses. A couple nights ago I had to physically block an intellectually disabled man from leaving the ward, so he tried to make a new doorway in the wall, with his head. Good thing he decided not to use me as a headstop, and I only had to use a relatively gentle hold on him.
Alternatively sometimes our colleagues do the hurting, during an operation I was assisting as an intern, my registrar accidentally sliced me with a scalpel. That he had used on the patient. Who had previously had Hepatitis C. (Fortunately her Hep C had actually been cured, so I was safe).
TNP has gotten cut (with a blade) before.