Well... I think that reason would say, tis best to rotate the boxes once in a while, so the pressure is evened out over time.
If a cigar, even round sits one way for a very long time, with other cigars pressing on it, there will be a subtle difference in one half of the cigar on top and bottom, as the bottom alwasy takes the extra weight of itself.
Of course the weight here is so minimal that it doesn't matter one way or another. Unless you have a box with a few hundred cigars maybe in one small tower with little distribution of weight.
So as said above, tetris is the name of the game, and you won't live long enough for rotating to matter all that much, but eventually youll need a bigger humi and move things around anyway.