I can’t agree with your assessment of MacArthur.
I would suggest you read William Manchester’s book on the subject, “American Caesar”, he dishes out the good and bad and you can ten make your own decision.
That’s fine. He’s a bit of a polarizing figure and I have a definite family bias. I can’t say definitively that he was a bad guy and I would probably rather serve under him than some of our current commanders, but that’s a whole nother ball o’ wax.
Anyway, IMHO, older commanders are not a bad idea as long as they are still competent. Their saving grace from my perspective is that older commanders are not driven by promotions, and can afford to be apolitical, if they have the balls.