According to the timeline of events in The Fine Article, this story only exists because someone cared. At many companies the story would end at "one diff reviewer noticed passwords getting logged in one diff". All of the numbers in this story come from an internal investigation to see where else they're making the same mistake, _so they stop doing that_. That's not what you do if you don't care.

If FB truly cared it would likely never have happened, let alone gone on for years. I'm not saying no employee at FB cares; I'm saying FB as an organization doesn't, and we have plenty of "I'm sorry, we'll do better" statements to back that up.