This is a myth. There is no fiduciary duty to maximize profits. There is the duty of loyalty, which mostly means you can't embezzle from the company, and there is duty of care, which means you can't do anything grossly incompetent that ends up harming the company. Duty of care is a VERY high bar (e.g. neglect safety standards and end up shopping e coli tainted food) and is nowhere close to being able to justify the "shareholder primacy" idealogy parroted by conservative think-tanks.