Because, so far in human history, individual rights-based political formulations are the only ones that prevent arbitrary atrocities from being perpetrated on citizens. Yes, American corporatism is brutal. American corporatism bounded by American democracy, imperfect as it is, is still vast leagues better (read: safer for global population) than nationalist authoritarian dictatorship. No matter how technocratically efficient that dictatorship has been in recent decades.
In short, if you're worried about singularities, aren't you worried about the priorities and command structure of the entities most likely to achieve it? About what options they consider to be "on the table"?
