500 foot rule and pilot opinion poll

I've been following all these responses with interest, but I feel we
have lost some of the forest in looking at the leaves on the trees.

The point where a glider race ends is arbitrary. We can end the race
-- calculate speed and give speed points -- for any landing within a 5
mile circle of the home airport. We can end the race as we do now, at
the airport fence. We can end the race 500 feet up. It's the same for
everybody. Where we end the race has no effect at all on the
competitive, soaring aspect. Adjust your arrival margin accordingly.

Now, given this is a totally arbitrary choice, doesn't it make a
little sense to end the race 500 feet away from the cold hard ground?

John Cochrane