I don't understand your facile notion of the science. That the virus might mutate within a week of the tournament. I don't think it works that simply. This is not a sci-fi film. The virus, as I understand it, came in in a very virulent strain. It killed it's hosts immediately. That's not an effective virus, because it can't survive that way, if it kills off its hosts too quickly. So the next wave was a version that didn't kill as quickly, or effectively, so that it could proliferate, and that's the one we've been fighting. Less deadly, but still highly contagious. And that's the problem...if it doesn't kill all of its hosts, it has the chance to spread. Cunning little bastards.
But no one knows if the next wave will be just because we have been incautious, or if the virus has mutated. But I will say this: AGAIN...NY is doing well right now, and the fake-Cincy is scheduled to start in just a few weeks. If tennis can pull this part off, responsibly, then they may have learned something about how to work in the pandemic. For sure they will take all precautions, and they will screen and test regularly. If there is an outbreak within the bubble, I'm sure they'll pull the plug. But what if they can pull it off successfully, and keep people working? And they keep using models that work, carefully and without outbreak?