I agree with several of the posts, it happens from t-ball on and it never really stops.
Since you are welcoming stories here’s a few from me.
In legion ball, I remember not playing much my first year and some of it was that some of the guys were older than me. The next year I played very well and played almost every game either at 1st, pitching or DHing. The next year is the year that our coach died, I had been batting 3rd or 4th in the order the whole year. The new coach stepped in and I ended up batting around 6th most games, I wasn’t too happy and we weren’t very good at all during that year (only had 9)
The next year was my last year, I still was batting 6th and was getting more accustomed to my role. I started to realize that batting 6th put me in more clutch situations and there were other people that were better in 1st inning RBI chances, there was a method to it, in other words the old coach had a bias to bat me higher. I was the one in the political favor. There were other people that were definitely favored over me the next year but I noticed that people generally tend to only notice the cronyism or politics when it is not in their favor. But after having been favored I can see how the people in favor are often oblivious to it, and the people that aren’t being left out or benched see it on a larger scale than it actually is.
In other words it is there, but it doesn’t exist to the people in favor and it’s a huge problem to those not in favor.
Another example is right now on our club baseball team at UWyo. the guy who usually starts has a batting average around .220 and that is also his OBP! He hasn’t walked once all year! The other guy that plays 1st a lot is a better hitter but has logged several errors in the last few games he’s played in. I have played in a few games and have a .600 OBP and a .333 avg. these statistics show that decisions aren’t being made off of who has the better stats they are being made off of either who the coach thinks “deserves” the start or who is perceived as better.
Don’t forget sometimes it isn’t politics. Sometimes a player is perceived as better due to build, speed, etc. but isn’t that good when observed from an objective statistical standpoint. It isn’t always right but that’s what happens sometimes. For example on the club team I’m on now, the guys that play over me regularly are both 6’ 4" while I’m barely 6’, one of them throws harder than me, the other runs faster than me. So the physical tools outside of technique can create the illusion of a player being better than he really is.
TL;DR - Unless you are negatively effected by “politics” you don’t notice. Sometimes cronyism is perceived when there is none by someone who doesn’t get their way. Sometimes it’s not “cronyism” but perceived ability as opposed to actual ability.