I probably missed it, but I haven't seen this mentioned before. The Force die does favour a dark side result, including total pips.
7 faces have dark pips, with a total of 8 pips showing.
5 faces have light pips, with a total of 8 pips showing.
7/12 * 8 = 4.67
5/12 * 8 = 3.33
So over the course of a session, a player will to deal with almost 50% more dark pips than light pips.
If they wanted to make it closer, every white face would have double pips, but it would still be fewer:
5/12 * 10 = 4.17