The field of biology was created by people who love to classify/name things. This has resulted in what we have now: A subject where the prerequisite to understanding is the ability to read long passages of text littered with jargon and visualize what that might represent. Even if everyone's reading skills were where they should be, the second part is not a super common skillset. It's one of the reasons why I work in…
But even that's besides the point of the fact that all these things are nothing more than abstractions created by humans, and ultimately it's all one giant soup of interacting molecules.