Could be, but I think he just didn't have the balls to call it like it is. He probably thought to himself: "Who am I to put the breaks on a good thing? If every body wants to party and drink, I am sure not going to pull the plug from the music box."
To except his excuse that he didn't see the housing bubble we have to also except that the nation's financial head honcho had less foresight than the guys in The Big Short. I think he saw the over heated markets, he just didn't have the balls to control them.