The real scandal was in the Philippines where MacArthur let his air force be destroyed on the ground. He sat locked in his office for hours after the Pearl Harbor attack doing nothing and ignoring his air officers who begged to be allowed to attack the Japanese air bases in Formosa (Taiwan). Eventually the Japs attacked the U.S. airfields in the Philippines and destroyed all those airplanes sitting useless on the ground.
MacArthur made some really bad decisions in his career. He topped what you referenced with his campaign in North Korea. He first slowed the pursuit of the NKPA by transferring the Marine Corps from the Seoul area to the east coast of North Korea, losing weeks of its use. Relied on inadequate port facilities to supply the USMC by doing so. Ignored the possibility of a million man PLA crossing the Yalu. Topped off by having a mountain range with no lateral roads between his forces.
MacArthur was over rated. He always seem to be caught flat footed. He thought the Japanese weren’t as good as fighters as we were, and they were tough.
Same as in Korea when he thought the Chinese would never cross to help the NK.....
MacArthur was right about the Russians and loved his country.