Most doctors don't have a choice or flexibility but to follow "the protocol" if they want to remain insured (and in practice) so diag almost always have to be followed by the "standard" prescriptions.
Some good doctors may explain the potential side effects and/or also recommend trying some alternative or parallel treatments or procedures, especially to their long-time patients, but it may come with some assumption of risk. It could help them if the patient is somewhat knowledgeable and would ask questions, then they could veer off the protocol slightly and say "you could try this or that"...
And with your statement you assign culpability without liability in the impaired health and disease of millions of Americans.
Your cavalier attitude reflects a bias toward those in the medical field rather than the public’s right to be treated without conflict of interest.
Blaming the patient with ‘assumption of risk’ without the patient being properly advised as to the facts of either their condition or the adverse health effects of their medication is a violation of the Hippocratic Oath and basic ethics.
Shameful.