[happytoexplain]

I completely agree that you can't better a body of people by forcing it to modify its constituents into a defined range of racial/gender ratios (and it may even be the case that you will worsen it on average). However, there is another goal: To help the individuals who would not have been hired. Of course, there's an argument to be made that any harm you might do to the body would then ultimately harm the individuals you helped to be placed in it, but I tend to believe that these opposing forces balance out on the net good side for the individuals.