Or maybe his brutal exile from Tibet due to Chinese invasion traumatized him in some way. I’m not a fan of rationalizing abusive behavior or hypocrisy. People can gain a lot of skill at something but it doesn’t make them a good person. Elon Musk falls in a similar category IMO.
I don't think enlightened beings can be traumatized. A better theory I've heard it's that it is easy to keep vows when you live in a temple and never been tempted.
My memory is that he had to escape through the Himalayas as a teenager. I don’t think teenagers can be enlightened beings. He failed to keep 2 of the 5 layperson Buddhist vows - a temple has nothing to do with it. From what I understand jhana >> booze, so why choose booze?