Even if everybody were forced to be equally open with their data, this would serve to amplify power imbalances that already exist.

We have fancy technology for analyzing social graphs and sifting through messages, but using this technology requires access to big (or, equivalently, many) machines and the manpower of humans who know how to work the technology.

Hence, groups that are already powerful have an easier time acquiring even more power.

I agree that given a choice between two evils (no personal privacy, or not personal privacy for anyone) I would go with the evil you describe. But I wouldn't be too happy about it. So I think it's worth fighting back.