Yeah if we could streamline to really know if someone's not contagious vs. their viral load that would make a difference.
Still, pretty sure at most work places, the general rule is if you have a fever, stay home. Someone could have a fever off and on for several days with a low viral load, and as contagious as that is, that disrupts the work place if in fact it does spread.
Also we're not sure if someone has had it, if they get re-infected, if they're infectious.
The one article notes that a followup with one of the new rapid tests should help provide clarity as to whether or not a person should be considered sick or contagious. That may be what they're doing in the NFL? Seems like they had a lot of "false positives" that all came back negative immediately thereafter.