Yo, we _need_ diversity. It's that simple. We cannot keep doing the same thing over and over again and expect thing to change.
We need women, LGBTI, Black, Brown, Native folks in the game because we need their ideas to push the community and culture forward. We need to make our spaces _more_ appealing to them because we need them. We need their insight, knowledge and experience to find solutions that elude dominant culture.
Diversity isn't a bullet point. It's literally life.