Thank you for your thoughtful comment. However, from what I understand, immune memory is usually more robust when ill, so I doubt asymptomatic infection would substantially drive herd immunity. As follows, high CT value may not always indicate robust immunity.

For the definitive test, Covid-19 severity is mainly driven by dysregulated immune responses, so I don't think correlating Ct value with disease severity would be a good definitive comparison test.

But I agree with your alcohol analogy. Perhaps early in the pandemic, we didn't know much about this novel coronavirus. Thus, precautions or public health measures against the virus may have been overly aggressive. I hope that will soon change.