It was a team of five senior level linux sysadmins who oversaw about 2k servers. Lots of arguments for and against pushing blame here or there, but at the end of the day - he fucked up big time and shoulda known better.
You have to expect people to make mistakes. I’m not saying he didn’t fuck up, but if a company is down a billion dollars the story should be of multiple people making multiple mistakes.
For what it's worth, a billion dollars for this company, while still a lot, isn't world ending. It was probably insured, too.