As I’m thinking more about news systems, news design and our social space this paragraph stood out to me. Bardzell, Bolter and Lowgren pretty quickly sum up why interaction design is important and why it is for people(s), not users.

As digital artifacts move out of solitary, task-oriented use situations and into the public and semi-public spaces of everyday life, it is becoming increasingly important to acknowledge that interaction occurs between and among people, not merely between user and application. Interaction design is design for social structures and performative practices, and mæve makes that point in a most emphatic way.

Interaction Criticism: Three Readings of an Interaction Design, and What They Get Us
Jeffrey Bardzell, Jay Bolter, Jonas Lowgren