First of all MacArthur was fired for NOT being PC! And who trained Ike? MacArthur. Ike worked for MacArthur for the 10+ years leading up to WW2. Without MacArthur there is no Ike.
Mac was a prima dona. He was the greatest general in his own mind.
He got fired for insubordination.
He would have been the worst thing to happen to this country. He cared about Mac first.