They lead off saying all of the buzz words about diversity which always rings hollow with me personally, and this decision is based on increasing diversity according to them.
Honest question: why should diversity (as they use it) ever be a goal? Immutable characteristics of a person should not be a consideration in any application to life unless the application is explicitly for that (tall people in basketball for instance). Meritocracy should be the paramount consideration in all things, and possibly a small consideration of diversity of ideas and beliefs, but not diversity of skin color or genitalia.
If all of the most brilliant astrophysicist minds in the world happen to be Japanese women, why shouldn't they be preferred over all others in getting into prestigious colleges to study astrophysics? Why do we care if we have a certain number of European males in that situation? The right answer is that we don't care how many European males enter that field (which is true today but for different reasons that I am not trying to get into).