monster hands on all in plays preflop

I've long bought into the conspiracy that cards are not random. I mean, how can there be so many bad beats on the river. The plausible explanation is that there are so many more hands per hour, so the likelihood of odd events occurring is also higher. I continue to play, so I'm trying to be level-headed and positive about the "randomness" of the cards.

My observation is this though, and I'd like comments from the veterans of the game. It's hard enough to catch a pair on the flop...33%. For instance, if I raise with AK and it's hard to hit that A or K on the flop. But it seems when two people are all-in preflop, monster hands suddenly appear. Everyone hits something. Most recent example I saw was 3 people all in...99 vs. 55 vs. AK. Flop came Kxx. Turn was a 9. River was a spade, giving the 55 a flush with the 5 of spades. Again, it's one hand and it can happen by chance. But I do notice more straights and flushes and full houses.

It's 33% to make a pair on the flop and showdowns are usually medium hand versus medium hand. However, when it's all in, it's full entertainment value more times than not.

Comments? Am I still in rookie mode thinking these things?

Thanks.