The problem with that is that linguistic terms are defined over time and can change through how everyone understands and uses them. For example, see the words

The problem with that is that linguistic terms are defined over time and can change through how everyone understands and uses them. For example, see the words gay and hacker. For the category of career types, definitions can only remain constant to an upheld ideal when there's a professional body that enforces what the term means. The professional body may or may not be successful in its efforts. For example, there are a lot of P.Eng folks who dislike it when software guys and network guys call themselves engineers.