I wish that were true, but this is a rather naive perspective.
Facebook has a well documented history of requiring outgoing employees to sign non-disparagement clauses. For someone as high up as Chief Product Officer you’d better believe that they would have Chris sign something expressly forbidding any overt criticism of the company. Any severance package which in this case is worth millions or tens of millions would be contingent on signing.
I’m actually surprised he was able to say as much as he did.