Not sure if you are purposely being narrow-minded or what here. Arbitrary does not have to mean "random", it just means that there's no real reason for why the NHL chose 2 assists vs. 0, 1, or even 3. I believe the NHL originally started out with only 1 assist, then after 1 or 2 years, switched to 2, and then in the mid-40's brought it down to 1 for a single season, and then brought it back to 2. If you try to find any explanation for what 2 assists is the most appropriate number of assists to accurately determine how points are best accumulated, you will find absolutely nothing.
Now on to your Gretzky example: I never once mentioned that having the most assists in NHL history made his success random, or indicated that he lacked skills, so not sure why you are bringing that up.
| Gretzky | #2 All Time | % Lead over #2 |
Points | 2,857 | 1,921 | 49% |
Goals | 894 | 801 | 12% |
Total Assists | 1,963 | 1,249 | 57% |
A1 | 1,324 | 797 | 66% |
A2 | 639 | 582 | 10% |
Primary | 2,218 | 1,547 | 43% |
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From:
NHL Stats
Gretzky has a better Primary assist dominance than he does secondary or total assist lead. His primary point lead over #2 is only a bit less than his normal point lead. If the NHL had historically recorded 3 assists per goal, I can safely assume that Wayne would still be the total assist leader, and the total goal leader, and the total point leader.