The Red Sox and Yankee's are tied going into the 5th inning at Yankee stadium, the Red Sox score two runs in their at bat and the rain moves in between at bats, you lose the field, and it is forecast to continue the rest of the day.
Do you start over the next day? Do you wait HOURS hoping the rain stops? After all they HAVE LIGHTS!
OR
Do you call it an official game and move on to the next game? (Don't ask Selig, he makes it up as he goes)
As far as I'm concerned it's the same thing. The race was official at lap 101, EVERYBODY knows that. EVERYBODY knows that if it rains after halfway and you lose the track it's done. No do overs.
Racing on Monday only happens if the race is called before the halfway point.
The Daytona 500 may considered "the Superbowl of racing" but in the grand scheme of the season it's race #1. No different than than race #28.
I agree with you, except they usually wait more than 20 minutes to call a race.