It's a random draw, I wouldn't look at it as anything else. WDFW gives averages which is unfortunate as it leads a bunch of people to think that the odds are WAY better than they are.
You can subscribe to GoHunt to see very near the actual odds at any point level from last year or do some crude math for free and get fairly close.
For example, I picked a unit with an average of about 3 points to draw. The actual odds of drawing with 3 points was 18%. The odds weren't over 50% until you got to 6 points.