For the record, as a social justice type, I think that the solution to diversity issues in the workplace isn't to enforce percentage figures - it's to figure out why the workplace isn't attracting members of X group, change it so that it is, and actively seek out applications from diverse communities. If you're doing everything right, you should almost naturally wind up with a diverse workplace. Of course, guess which of these choices is the cheapest and requires the least amount of change in culture. One can also be imposed top-down while the other requires cultural buy-in in the first place.
you should almost naturally wind up with a diverse workplace
That's a factual claim which implies that different groups of people are uniform in their preferences and thus you'd find equal representation of people across all fields. A lot of people find this to be an absurd proposition with a mountain of evidence to contradict it.
If cultural and workplace issues were the explanation for disproportionate representation in different workplaces then we would expect to see the countries which implement the most solutions to those issues have the most equal representations. In fact, what we see is the opposite. The Scandinavian countries have the best policies (generous child care, long parental leave, extensive anti-harassment and anti-discrimination training, board quotas) and yet they have even more gender self-segregation by occupation than other developed countries [0].
