Chess Or Backgammon?
If you look under a chess piece, you might not always find a dice there, but if you do find one, you would need to make the most of the possible chance if it tries to present itself. Do not be surprised because someone can offer an explanation for almost anything.
The most important reason for doing this is to provide support for the piece so that it can stand upright and steady on the board. This is the most important reason for doing this. What was just described is the action that needs to be taken in order to achieve this goal.