> I can't use words to ask a 3d printer to make something.
You can: the words are in the G-code language.
I mean: you are used to learn foreign languages in school, so you are already used to formulate your request in a different language to make yourself understood. In this case, this language is G-code.
This is a strange take; no one is hand-writing the g-code for their 3d print. There are ways to model objects using code (eg openscad), but that still doesn't replace the actual mechanical design work involved in studying a problem and figuring out what sort of part is required to solve it.