Yeah I don't take issue at all with voluntary contact tracing, and I imagine it would be pretty beneficial. My only point was that MIR's "return to normalcy" was vague and that a world with contact tracing wouldn't really be a "return to normalcy" I don't think, because we've never really done nation-wide contact tracing. I also already acknowledged that what I was saying could be seen as pedantic so you don't get to make that point now, buster.
testing and contact tracing alone will do pretty little to "return to normalcy". We've really done a shitload of testing which is great, but hasn't really slowed the spread or made anyone think their liberties are being infringed.
Contact tracing can be good old fashioned calling and interviewing people, it doesn't require a technology, app, or surveillance with questionable privacy implications - I don't see how a world with basic contact tracing couldn't be "normal". I actually prefer the old-fashioned contact tracing because it could get people back to work and takes the approach of "we want to keep your family and community safe, so tell us where you've been" rather than having people think google is spying on them.
but really the only thing that gets us to "return to normalcy" is a confidence that activities we engaged in February won't likely allow us to either catch or spread the disease, regardless of what the state is ordering. To get there, I see two options: aggressive isolation of positive cases and contacts or a vaccine. Or, I suppose a third that involves a shitload of nursing home residents dying.