My opinion....
The best team doesn't always win the National Championship in single elimination.
The tourney is great fun but not sure why so many think it's so much better than the NBA playoffs in which a series of games tells the true tale...
You're right, the best team doesn't always win but maybe the best team should win the games they're supposed to win or maybe they aren't the best team?
The only american sport where the truly best team wins it all almost every time is the NBA.
In every other sport winning a championship and being the best is not always the same thing.