TV interviews like the one on 60 Minutes involve hours of taping, which is then heavily edited into just a few minutes that is shown on TV. What you are seeing is what CBS chose out of that footage, and is not necessarily representative of the bulk of what the Capt. Sullenberger said. He may well have spent quite a bit of time praising his co-pilot, all of which wound up on the figurative cutting room floor. Don't blame the Captain for the network's editing.
I agree and would add another view as well. One takes some risk when facing cameras of foot & mouth disease or more delicately a mis-speak. Your company, your union and indeed your fellow workers may not want to have to defend this and thus unrehearsed statements are more easily stated as the singular "I"