It's unfair in the sense that this progressive or far left ideal is allowed to be pushed onto entire organizations and by the media as de facto "right" or "correct", which is inherently a political position and would likely offend anyone who disagrees with it. If these processes and programs should be publicly enacted on people who disagree with them, it's unfair then to disallow any discussion about them under an implicit threat of termination. Google just confirmed that threat is very real. I know many conservatives here (a classical liberal / libertarian mostly myself, which is far too "right leaning" for this area) who are actually scared of any political discussion due to this exact threat, even though those with the "correct" opinions can openly discuss them without any fear of repercussions. I don't think they should because inherently politics brings out discussion and debate, often vigorous forms of it, and that's not generally the best thing for the office, but because that discussion/debate is effectively banned here, it's completely fine to express leftist and socialist ideals publicly, even if in extremely poor taste.
Secondly, if you were to decide to bring up issues with these programs with a person responsible (for instance in Google's case, this VP of diversity) you'd get a predictable dismissal, or they'd silently drop whatever issue you raise, which means you have no actual means with which to present these viewpoints. She publicly dismissed the entire thing without actually refuting any argument that was made, with language that effectively sounded something like "this is wrong think, and Google doesn't agree with this wrong think." You could do it outside of work, but you lose the context and the specifics of the program, and more importantly the impact any such discussion could have on your immediate environment.
These discussions do need to be had, and where they're being had, the majority of even liberal minded people tend to agree with the author of this piece, but it's hard to know if that's a consensus (even at 500,000+ views for instance on each video on YouTube) or if it's just an echo chamber because even demanding rigor and evidence of the ideas behind diversity is taboo in far too many places. For instance tptacek can be found in these very comments essentially arguing that this topic of discussion isn't open because it's been decided. By whom? How can any discussion of highly debatable topics like this be had if people like him and Google are just going to say "it's not up for debate because I'm right" in order to shut down any discussion before it can even begin, hilariously in this case by likening this to discussing child labor or marital rape? It's nice to see logical fallacies are alive and very well with people who otherwise seem fairly intelligent.