Because they are publicly traded and subject to lots and lots of checks on corporate governance. The CEO actually didn't want to lay people off (and did a shit

Because they are publicly traded and subject to lots and lots of checks on corporate governance. The CEO actually didn't want to lay people off (and did a shit-poor job of it when he did). He was getting pressure from the board, who in turn was getting pressure from a lot of activist hedge funds. Small-fry who operate secretly are able to take the long view and enrich themselves off the masses' stupidity. CEOs of a multi-trillion-$ company that is ~10% of the retirement portfolio of every American are not. At that level you have to go with the market consensus, because you will be ousted and deemed not a fit steward of the enterprise that you are entrusted with otherwise.