You are right. And the hook is for convenience, not for safety. Having explicit sandboxes is good, of course. But in addition I also treat my whole computer

You are right. And the hook is for convenience, not for safety. Having explicit sandboxes is good, of course. But in addition I also treat my whole computer like a sandbox, it least in the sense that there's no files I would mind if they were overwritten or deleted: you should have backups anyway.