More details could still come out.
That said:
Maybe half the population has at some point gotten behind the wheel of a car when they'd had a drink or two and, whether they were completely sober or not, felt like they weren't impaired and maybe weren't.
A very, very small percentage of the population has ever driven so drunk that they hit a building, and then tried to escape.
This is not a little thing. This is a he's lucky a little girl wasn't standing where that wall was thing. It might warrant a team intervention, a screening to make sure he doesn't have a problem, a mandatory reporting thing. And after fleeing the scene, it might put him in jail.
Again, based on this story, and acknowledging more details may change our understanding of what happened.