Can you see light through the crack?
I might try pre-drilling and setting in a couple of bolts. Go all the way through and put washers on both sides. You could countersink them for a more "finished" look. Do both posts to make it look planned.
Both answers above are really good advice. If you were to do this yourself, you would either need to devote lots of time and muscle or you would have to take a crash course in heavy machine operation (Not impossible BTW. Bobcats and small excavators are available for rent).
But before anything...
If it slows down the spread of the cloud that comes out of a person's mouth, it is helping.
If it keeps you from forgetting that you need to be an active participant in stopping this thing, then it is helping.
Problem with the media.... ALL media..... is that they have to make noise all the time (fill the airwaves), so they take whatever bit of info they can find and they shout repeatedly until the next bit of info surfaces. Lather, rinse, repeat.
Well thought out Flyover, and you may have hit the nail on the head (appropriate for houserepairtalk). It explains how a person (even a scientist) can say one thing in February based on what is known, and then have to change course in April when additional facts show themselves. We are all...