The author conflates "viewpoint diversity" as it pertains to a workplace setting with political diversity. There are many benefits in a workplace to a diversity of views on how to approach the work and this kind of diversity improves the quality of the product the organization produces. But is this true for political diversity? Maybe, but the author doesn't explain why, and it's not clear what studies exist that support his view.
I don't think this is an intellectually honest article.
I don't think this is an intellectually honest article.