Question for the ex-softie you are: How is it legal to talk, potentially critically, about the company after someone leaves? Don't they have lawyer-written empl

Question for the ex-softie you are: How is it legal to talk, potentially critically, about the company after someone leaves? Don't they have lawyer-written employment contracts with a confidentiality clause saying "The first rule about things that happens within the company is, you don't talk about things that happens within the company"?