I "Have nothing to hide"... So long as the government agents who're tracking me have nothing, either. I will give up all my phone metadata as soon as everyone gives up all their phone metadata. I don't care about the privacy, only about the power imbalance that it creates.
Admittedly, I don't think that it's a good idea: There are many people who do care about privacy, for good reasons. The LGBT teenager who's not out yet - and never will be, to their parents, because of old bigotries. The kinkster with a vanilla SO, who goes out to be beaten and then goes home to have sex. The recovering drug addict, anxious to hide their checkered past, relying on the anonymity of moving to help with their future job prospects and recovery. These are all good reasons to continue a world with privacy... But I personally am fine moving to a more open world, and if society chooses, to damn these people with the rest. It's just important to me that we go into that world with eyes open.
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.
Admittedly, I don't think that it's a good idea: There are many people who do care about privacy, for good reasons. The LGBT teenager who's not out yet - and never will be, to their parents, because of old bigotries. The kinkster with a vanilla SO, who goes out to be beaten and then goes home to have sex. The recovering drug addict, anxious to hide their checkered past, relying on the anonymity of moving to help with their future job prospects and recovery. These are all good reasons to continue a world with privacy... But I personally am fine moving to a more open world, and if society chooses, to damn these people with the rest. It's just important to me that we go into that world with eyes open.