In the first 4 hours of any software project, we could, indeed, characterize what we do as "writing code". But that's the morning of the first day. After that, all we ever do with code on that project is change it.
Professional software developers *change* code.
"Develop" is a synonym for "change".
To learn how be a professional software developer, focus your learning around the topic of *changing* code.
@akshayde @GeePawHill Bullet dodged! Can only imagine the mess they must have