The first one isn't criticizing the lack of ability to set default pull behavior, it's criticizing that if you try to set an alias overriding a built-in command

The first one isn't criticizing the lack of ability to set default pull behavior, it's criticizing that if you try to set an alias overriding a built-in command, it fails silently, instead of giving any indication that your alias doesn't work. Basically all the criticisms in Git Koans still apply.