Why?Yeah that's not quick enough for total containment Australia style if you want to do outdoor only + screened indoor. You have to get it down to an hour and during that hours you have workers idling.
You just need to catch people before the viral load gets high enough to be contagious. A hypersensitive test that catches low viral loads works to your advantage here. It takes 1 day to get results, but that’s not a problem if they begin to test positive 2 days before they are contagious. This is hardly an impossible problem.
I suspect the bigger issue is we don’t want to spend $30 per employee per day on tests and N95 masks at our meat packing plants. When you’re only spending $12 per hour to have someone cut up your chicken for you, that $30 really eats into the profits.