You like all other MacArthur haters have bee brainwashed by leftist propagandists.
US fighter patrols were up before dawn searching for the Japanese... but there were none... because the Japanese attack planes were grounded on Formosa due to heavy fog. By the time the fog cleared and the Japanese strike force reached Luzon, the American patrols were low on fuel and had to return to Clark for refueling. That is why they were on the ground.
So Mac wasn’t smart enough to have rotating flights up looking for Japanese planes?
Still doesn’t explain why his planes weren’t better dispersed on the ground.
One Japanese survivor said the planes in the PI were practically wing tip to wing tip when they attacked.
Mac dithered in the PI.