Translation: our move to force everyone back to office didn't cause as much attrition as we'd have liked. We will need to turn the screws in a different way.

I'm not trying to apologize for Meta here, but sometimes companies make bad hiring decisions, or good workers get lazy/apathetic.

Or have children causing distractions, or get injured etc.

Or having their house burned down with not enough PTO remaining..

I can imagine also that in some situations where there's a large volume of work to be done and you don't need a high performer to get some of it done, you'd rather have the low performer than nobody in that position so you can make progress.

They used to have a higher bar before 2020, but since then it's been a bit soft. I think this is mostly a return to that earlier time.