In 2006-07 AND 2014-2015, the exact same teams played in the championship series in back to back years, and
In 2010 through 2013, two teams took up 5 of the 8 spots in the finals in those years.
Now let me continue this lesson on randomness.
You make the typical mistake of using a small random occurrence to prove your point that there's no randomness. It's pathetic but understandable given that most people don't know these things.
In Pat Casey's first 10 years at Oregon State (1995-2004) they made
zero postseason appearances and had 7 losing seasons in the Pac-10.
So 10 seasons is not a small sample size.
Then all of the sudden from 2005-2007 they not only make the postseason but they reach the College World Series in all three seasons. They go 0-2 in 2005 and get crushed in their opener 11-1 (by Miami) in 2006.
So in 12 seasons he's shown no signs of being a great coach and doesn't have any real postseason success of any kind.
Then all of the sudden his team wins 6 of 7 games (including a game where they were one out away from being eliminated) and wins the national championship.
The next year they finished with a losing conference record (10-14) and lost 8 of their last 13 regular season games causing them to nearly miss the postseason altogether.
Then they improbably reeled off 10 straight wins to take home another national championship.
In 2008 they missed the postseason again. Since then they have one College World Series win.
Your example of the lack of randomness is one of the most random examples you could've come up with.