As opposed to normal users who all have the same privilieges and then a superuser account that doesn't even use permissions.
Root undergoes no privilege or permission checks.
Super user does use permissions but then will allow override if directly specified... had plenty of moments like these editing the hosts file...

I asked "So how will groups help you set up directory that allows a user to delete files, but not subdirectories while allowing the user to create subdirectories (with a predefined set of rights different than the original directory) but not new files and disallows the user to execute files or traverse the directory and allowing them to read file attributes but not read file security settings?"
Very interesting example... Is this a real world example?