I really appreciate this answer, and as a lay person, it helps me put some pieces together in my mind. I suspect there are at least four reasons for testing, and they all benefit from better results, but two of these need good quality unbiased general statistics, and the other two only need high confidence negative/positive results for specific cases:

- Policy makers weighing the strategic pros/cons to orders for the public

- Individuals (either frightened or skeptical) weighing their decisions

- Physicians treating patients

- Quarantining people based on contact tracing