system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why are baseball teams so inconsistent year-over-year compared to basketball teams and those of other sports?
gpt
Baseball is a very difficult sport. The best hitters fail 7 out of 10 times they go up to bat. Slight deviations from that can result in big changes of the outcome. Scoring is very difficult, either through homeruns or actually gettin a runner around to home. Then you look at pitching. You effectively have to hit a 1.5ft by 2ft area from 60 feet away while throwing it either as hard as you can or with some type of special spin. In addition to that, you are trying to aim it at some point the catcher tells you to put it at. If you are off by even a few inches sometimes, that can be the difference between a strike out and a walk. Slight variations in baseball can lead to huge differences in the outcomes.

Now compare that to basketball. The average shooting percentage is about 45%. That means every other time a player shoots, it is likely to go in. This is a much higher rate of success. On defense, letting the other team score is not as disastrous because it is easy to turn around and score on them. Mistakes in basketball are a lot less punishing. It is a common strategy to foul in order to make it more difficult for the other team to score. 

TL;DR: Baseball is very difficult compared to most other US sports. It has a high cost of failing with a high rate of failing when compared to other sports.