Bear in mind Roethlisberger is 23, and completely fawned over in his world too... He's a kid for all intents and purposes, and one who everyone he meets caters to him I'm sure, so I gotta imagine he has a certain level of irresponsibility in him.

Seriously though, I think he did have some kind of feeling of invincibility... Because he actually pretty much said that in a statement he released last night. He said he was sorry to the Steelers, to his coaches, the Rooneys, the city of Pittsburgh, and to the Steeler fans, and admitted in his release that he has an obligation to protect himself in the off-season...
He also said if he's riding a bike again in the future, he will be wearing a helmet... That he thought he would never be in a situation like this and that he's a safe rider...
I really feel like the press statement he released was a nice gesture and showed humility on his part. He could've just kept quiet but while still in the hospital he decided to own up to it...
The other news has also pretty much confirmed he is physically ok for lack of a better term. He's got no serious injury, and he'll likely be fine for opening day and hopefully he'll make it for half of training camp or so like predicted. He had Titanium plates screwed to his jaws and he'll have a semi-solid food diet while he heels so he's less likely to lose weight and things... He's supposed to be out of the hospital actually in 3 to 5 days (this was a day or so ago too), so he seems to be fine...
And Pittsburgh can change it's loaded diaper now.