Ahh, but consider this.
I maintain that a person that has tested positive might actually NOT have Covid. If the test is excessively hyper sensitive then it will inevitably yield false positives. It will detect microscopic remains of a spec of dead tissue from a long gone infection possibly that the patient never knew he had.
Now the problem becomes how to get the same patient through future such hyper sensitive tests so that even that test yields 2 ‘negatives’ 24 hours apart. See how this flawed test can both create the ‘problem’ and then make it unnecessarily difficult to solve the problem?
Think about it.