On one side, the internal social justice campaigns are incredibly pervasive due to large usage of internal message boards. On the other side, Google is one of the few companies that allows this level of internal airing of dirty laundry. I've heard stories of similar incidences at Microsoft which were swiftly shut down.
The problem is that when you encourage internal dialogue and communication at a huge company like this, you'll never have people with different opinions pitching in. You'll mostly get people with the most 'acceptable' opinions, the others being silent as they value their jobs. It's a huge risk to be singled out as someone who thinks Damore was right or that Maven should've been continued. As a result, you'll get a constant stream of one-sided social justice campaigns which inevitably leak to the press.
Encouraging internal dialogue and communication but not understanding its limits at scale is one of the biggest mistakes Google has made. Google was built on principles of open company-wide communication and sharing of information, and while it clearly doesn't work as intended anymore, there's too much inertia to change the course.