This is a false dichotomy. Professional contact tracers must be in charge. Contact tracing apps help them do their job more effectively. His arguments also see

This is a false dichotomy. Professional contact tracers must be in charge. Contact tracing apps help them do their job more effectively. His arguments also seem to assume that testing will remain scarce. But testing capacity keeps increasing and as lockdowns continue demand goes down. Schneir seems so out of his element here to the point that his arguments devolve into name calling. Unfortunately this is going to taint his future credibility on contract tracing. It would have been nice to have his input on the security and privacy concerns of this issue.