I do agree that many of us knew about the privacy implications of software as a service already and the outrage is somewhat artificial and about reminding others.

It's still a notable event when huge amounts of personal data leave the different silos and is combined and exchanged. It's a breach of trust when you voluntarily give personal information to a company and then this information leaks to a third party where it's further exchanged with subcontractor companies. At this point accountability and transparency is completely lost.

If you have personal data on google and google abuses this information you have ways of dealing with it. You can change the service, out the company, sue, ... With an opaque shadow industry there is little you can do in case of abuse.