I respond that this is inconsistent with both stated policies and established practice, and such managers can and should be targeted to answer for their bias and have it corrected. I would also respond that if a journalist with an axe to grind were to search hard enough and interview enough people, they're bound to find someone they can put on a pedestal and point to saying "look at how corrupt these people are!"
If anything, a person believing this sort of anecdote about an organization says more about the believer than the organization in question.
> Why is it that so many of my acquaintances who work at Google pig-piled James Damore over his professional competence, despite none of them being in a position to have any idea about that?
That does sound unfair: Damore was a senior engineer, which not a title that's given out lightly. Again, though, peoples' possibly unfair commentary on his professional abilities says nothing about the quality of discourse in the company. And again, one's willingness to balloon these sorts of individual anecdotes into indictments of an organization as a whole say more about the person doing the indicting than the organization in question.