LateralFlyer, it isn't "reasoning", it's reading FARs and Opspecs.
Of course the company is going to listen to a cap if he an issue with a pax, but at the same time, that is not free rein for (nor a right) for captain to do as he wishes, with no questions asked.
Obviously the chief will get involved with any unusual circumstances (and scream "opspecs! ... pilot in command!" all you want).
Who are you trying to kid?