They're only following the science. Just ask them and they'll tell you.
"So you mean that the tests aren’t accurate to tell if you still have the virus now? And that you’re just telling us that they might throw positives for up to 12 weeks, even after you might no longer be contagious? Why are we only hearing about this now from the CDC? How long have they known this? All kinds of people and businesses have been making decisions based on these tests. They’ve factored into restrictions and lockdowns, and now we hear that they may not be accurate? Why, then, was so much built around them?"
CDC Director Drops Bombshell Calling COVID Testing Protocol Into Question
https://redstate.com/nick-arama/2021/12/29/cdc-director-drops-bombshell-calling-covid-testing-protocol-into-question-n498778