Suppose I have 1000 people from community and 10 out of them are gender minorities. I then have 5 projects, each with 10 members on board committee, and I want a representative of gender minority in each of them. And I choose hard workers based on merit, the best of the best.
In such case I will be choosing 9*5 = 45 people out of 1000, and specifically I add 1*5 = 5 people out of those 10.
So the board committees will have 45 members each with (worst case) 955/1000 = 95.5% percentile performance, and additionally 5 members of gender minorities, each with mediocre 5/10 = 50% performance.
The gender minorities will perform worse, because we specifically singled them out of the crowd. This is not how you improve diversity.
It is impossible to satisfy all minorities at once. The best outcome is to pick an adequate, sane person from the community with proper mindset and proper judgement, irrelevant if they’re from a minority or not.