Who needs a test to know if he's sick?
And we know that not all tests or testing is 100% correct all the time.
It would help if the aymptomatics knew they were infected so they could quarantine and not be a major source of spread. But, as you say, the accuracy needs to be there. Also, I don’t understand the benefit of this test verses one you can have professionally done for free/less with a quucker turn around time.