As discussed Time limits for unfocused discourse threads?, we tend to discourage unfocused threads.
2–3 entirely different questions, but each complex topics in themselves (why does Julia have “unsafe” operations? why should packages be allowed to access undocumented internals? something about functions and macros and eval?), is already too much. Coupled with the fact that the overall topic (“Why is Julia such a messy language?”) is unfocused, this clearly falls under that policy so I’m going to put in a time limit.
If you want to open a specific topic with some question about Julia’s design, e.g. “Should Julia eliminate ‘unsafe’ operations?”, you are welcome to. We just don’t want meandering open-ended threads.