system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why are steroids such a big problem in the MLB but not in every other professional sports league?
gpt
The major reason is that in no other major sport does brute strength play such a significant role. In most other sports strength has to be balanced by other factors such as speed, agility, and endurance- all of which can be negatively affected by putting on excessive muscle mass. However in baseball, for half of the game you have one task and one task only- hit the ball as far as you can. 

The other factor is baseball's consistently spotty enforcement of steroid rules. This requires a bit of a history lesson.

Baseball went through a mini-crisis after the '94-'95 strike- baseball had long been declining in popularity, and add on the public outrage of millionaires squabbling with billionaires over money, and interest in baseball was at a nadir. However, baseball went through a mini-revival in 1998 when two power hitters, Mark McGuire and Sammy Sosa, went neck-and-neck through the entire the season to not only break the long-standing single-season home run record, but to beat their rival and set the new record. Just a few years later, Barry Bonds beat them both and set a new record that still stands today. Exciting stuff right? Except now it's become abundantly clear that all three players were using steroids to achieve their records, and that most officials and sportswriters at the time were aware or at least highly suspicious, but didn't care. As you can see, baseball has a perverse incentive- home runs are exciting, viewers tune in to watch them, but enforcement of the steroid bans would have kicked out the players most people were excited to watch. Thus it wasn't until the late 2000s and really recently that baseball got it's act together about drug testing, but for a long time they basically closed their eyes to much of the steroid use.