isn’t nostr overrun with cryptobros?

Junior compiler writers exist.

You can have a junior write compiler code, but you won’t have a junior compiler writer. It’s a very specific niche topic which does not have the demand for this.

They don’t teach CLIs and git and debugging in uni.

Well, they do. Version control is extremly useful for doing projects especially in groups and debugging is a necessary tool for building systems. These are not the main topic of the courses, but they are taught and practically mandatory.