If a doctor reads a medical study, takes a risk, and the patient dies anyway then the medical review board will ask them to explain themselves and why they didn't follow procedure.
Physicians are required to provide treatment within the standard of care. I'm not sure if that's the "exact rigid procedure" that you are referring to, but I would note that this requirement is imposed by the legal system.
Also, it really makes me sad to hear that you think that doctors don't care about their patients that die. I am a physician, and I can tell you (anecdotally) that doctors I have known who lose patients don't take it lightly. I'm sure there are exceptions, but I would ask you to back up such a broad and accusatory statement with some evidence.
What's a "bad day at work" like for you?
Perhaps you had a bad experience with a physician, but please don't generalize that to the entire profession. That's a ridiculous, inflammatory starting position.
You don't know anything about being a doctor.