I don’t think the book revealed anything new about FB’s bad deeds, though. Was there novel info?

I think its just more exposure for already bad things.

Had she had a trove of emails or something, I might thing differently.

This is quite different from the recent lawsuits that produced novel material and evidence.

Knowing something is happening and reading detailed descriptions of them actually occurring is different, IMO. I learned things I didn't know while reading it, at least.