>I'm not persuaded by some of the ideas they have (like adding diversity to their governing board, seems designed to be exclusive to tech-startups that already have a bias toward that "value").
It means somebody is feeling so insecure about their masculinity they can read about a new stock exchange doing about a hundred things differently than the status quo, and hone in on what strikes me as the single most benign initiative to complain about.
I define a value as an idea or concept you will appreciate at the sacrifice of something else.
Most speeches about "diversity" are mostly quota-related and, as another comment said, imply is a good on its own: thus not a value.
I have plenty of other opinions about using diversity as a value, but what you can see objectively is that if you grabbed 100 companies that are sensitive to that language, most will be tech. Thus, the selection is gravitating.