system
A chat on subreddit /r/me_irl
human
Understanding cells *is* relevant to our daily lives, though. There are so many things like soap, disinfecting sunlight, and food preservation, that are better applied by knowing what cells are and how they reproduce.

People in the past weren't stupid, they just didn't have the same understanding of the world that we do. The mitochondria might not be specifically and precisely useful to you, but knowing what cells are absolutely is 


Education is about fundamentals, rather than covering every possible scenario. When someone makes a passing reference to Plato, school is the reason you don't have to ask them to stop and give you a quick rundown on Plato, Greece, and philosophy. Even if *you* specifically don't use a certain thing you learned, I guarantee you other people do. 



(Edited from "made possible" to "better applied". People knew about soap long, long before they knew about cells, but cell theory made better soap possible)
gpt
Understandable. I was just making a funny.