> Careless People would not have been possible had SWW exited FB within a year

Sure, that book might not have been possible. But also the unique things she did for the company might not have been possible as well. To her credit, she does a good job of pointing out that she was complicit, but if she had listened to her own voice early, there is a small possibility that Facebook might not have been as powerful. Multiply that possibility across several other employees and imagine where the road could've led.

There's a difference between post-facto bravery (sometimes much less than that) and using your own legs to walk away much early and not enabling things you are uncomfortable with. This is what other people have been trying to point out.