Torah
The gemara brings a story to prove the point under discussion. That doesn’t limit the story and what can be learnt out of it. However the way it works is that the story has a very specific purpose and that is to prove the statement that was said previously in the gemara. Its like if you have a discussion with your husband and say Ill prove my point with the following story, there was this guy in the coffeeroom….and one part of that story will prove your point even though there can be many other observations from the story.