I agree, but I think a key point off the OP's argument is that a change in our expectations for what girls can and should be doing and worrying about has been to their detriment (increased dieting, watching of beauty pageants etc). Nowhere does she argue that we should ignore biological gender differences. However she rightly notes that culture strongly shapes experience and development, and our current culture is (in her and my opinion) likely to harm girls opportunities to experience a rich and fulfilling life.