I read somewhere that the poet Tomas Tranströmer said a similar thing about drawing as a form of concentration. Makes total sense for dealing with the mess of a move.
Actually Tranströmer was a big fan of playing piano for that focus, not drawing. The hand doing its own complex thing to free the mind. But same idea for sure. Drawing would work the same way, gets you out of your own head. Perfect for when you're drowning in boxes and need a mental reset.