I wouldn't call the act of attempting demographic balance in a field 'stubborn'. History often teaches us that differences between groups are contextual rather than intrinsic. When I say contextual I mean they are often for reasons that have to do with specific social forces at work during specific historical periods.

For example, there was a time that software engineering was dominated by females. At the time, software development was considered a feminine task. Should we have concluded, at the time, that females were more inclined toward software development?

Any time a particular group dominates a particular field, we should question ourselves as to why. Because history shows that the reason is usually some form of erroneous preconception. Of course that won't always be true, but it is often true and should be questioned until it is obviously not true.

The benefit of continually questioning particular groups' dominance is obvious: once a particular narrowly conceived field is opened up to more people, the talent pool behind that field will grow.