So four months later and a 6500 mile trip to the east coast and back to Colorado and absolutely nothing regarding that brace so leaving it off forever so it is a breeze to remove battery.
So, it would seem the issue is what happens in an accident, not whether you can avoid dislodging the battery by staying on-road.
With the combination of a battery containing quite a lot of potential energy, the additional current from the charging system, space being tight on motorcycles, and battery acid, the makings of a bad day would appear to be increased. It could also be a unhappy surprise for the next owner as well if the battery arcs against the frame while out in the boonies. ¯\_(ツ)_/¯