I don't see the connection. I'm not suggesting that we don't tell Northeast Louisiana that we are opening Southeast Louisiana, just the opposite. I'm also not suggesting that opening up means 'return to December 2019'.
Anyway, the virus will spread again once any single place opens up for the foreseeable future.
Since we can't "pull a Wuhan" and barricade citizens into their homes and shoot the stragglers, either we do it in stages in places that are ready to open up (and then tighten down if needed) or wait for it to be gone from everywhere before we do anything. That second option isn't feasible. If we really intend to keep NOLA on lockdown until Avoyelles, Winn and DeSoto Parishes have zero cases, then we can just forget it.