There are factors to consider, like the brewer’s own environment, a burr’s constant exposure to humidity, and the method’s effectiveness on multiple doses. If the humidity in your space is already at a certain level, the added humidity created by the mist may be too much.
May not necessarily be useful for everyone, especially those of us in humid areas.
From https://www.baristamagazine.com/spraying-your-coffee-beans/
Still, probably worth giving it a try.