In more professional settings certain job titles seem pointless but actually add a diversity of thinking that would otherwise be lacking. For example, you may

In more professional settings certain job titles seem pointless but actually add a diversity of thinking that would otherwise be lacking. For example, you may not really need a lawyer to check something. But good lawyers have a knack of identifying logical inconsistancies and always find spelling mistakes which is useful. Or an IT expert operating in an office of social scientists will think about problems in an entirely different way. Sometimes maintaining a multi disiplinary team is more important than being 100% efficient on an individual level.