I think you are missing my point. That is, that the argument 'TDD doesn't do design, people do' is a glib and not very illuminating argument, just as when it i

I think you are missing my point. That is, that the argument 'TDD doesn't do design, people do' is a glib and not very illuminating argument, just as when it is used in the context of guns. Of course design is ultimately up to people, but they do that design in an environment of tools and methodologies. Those tools affect the way people approach problems, and what kinds of things are easy vs difficult. So tools do matter, and choice of tools is also a political issue in that there is no absolute "right" or "wrong", just better or worse depending on when and how they are used.