A friend sent me this link to an interview Studs Terkel did with Tibbets in 2002. The piece is called, quoting Tibbets -- One Hell of a Big Bang.
This belongs in your Banality of Evil file -- The Banality of Evil being the title of Hannah Arendt's book about Adolf Eichmann.
But I am not now equating dropping atom bombs on Japanese cities with the Holocaust in Germany in WW2. That's not my point. My Banality of Evil file is more capacious than that.
You could even, after grim and serious consideration, support the decision to drop those bombs on both (??) those Japanese cities given the prospective costs of an invasion of Japan (the usual rationale) and still be appalled at the merry indifference Tibbets displays toward what he did.
He named his plane Enola Gay after his mother. That sums up how he was feeling back then. Ok. Maybe. Chalk it up to wartime weirdness.
But the merry indifference persisted all his life, as the interview shows. It isn't like he carried a grave burden around with him in full consciousness of what he had done. It was always just a fun story to him.
That's where the Banality of Evil part applies...