I still have that burning lesson in me from being told by airline managenent that the Captain is a captain and makes decisions (some right and some wrong)
However, we do look to place some limitations on those decisions being answerable to a higher judge (after the fact) After all we are not operating completely ad-hoc in flying.
Immediately in a case like this I look to the SOP provided to him in the cockpit. If he is within the SOP then it's purely hindsight about good or bad decsicion making (food for PPrune). If he is outside the SOP it's up to the airline to offer him a chance to explain.
If the SOP is wrong or in some cases I'm familar with (not even available) than its a enforceable regulatory function to correct with the operator.
In this case I've seen enough to feel it's the latter