Your edit is worth debating, though I doubt there's an easy way to settle the argument between ethical concerns and the efficacy of tracking at phone cell granularity. Most of what I've read in that regard didn't really indicate that particular technological capability makes more sense than an overall lockdown since it can hardly be called targeted.
For further context: The example you replied to references this data in the hands of advertisers, with extremely questionable claims about their pseudo anonymization. That just made your comment before the edit less sensible. I believe such a debate might make sense at the level of a government agency, private entities exchanging that data is just a ridiculous idea.
Contact tracing via technology doesn't have to be via phone towers or anything like that (I agree those have little value outside of the aggregate). Anonymous tracking solutions via bluetooth that are much more are actively being developed and have also been advocated for by people affiliated with the CCC (as well as epidemiologists).
For further context: The example you replied to references this data in the hands of advertisers, with extremely questionable claims about their pseudo anonymization. That just made your comment before the edit less sensible. I believe such a debate might make sense at the level of a government agency, private entities exchanging that data is just a ridiculous idea.