I don t know the original basis of this style but it s a fact that it is the style presently used on Wikipedia One problem is that at least some of these are only proper nouns when applied as a specific title rather than generic noun itself for example As of this month Congressman Smith is the congressman who represents my home town Again I m not agreeing or disagreeing with specific usages merely noting how this are done at this time I see on your talk page that another editor has already told you a good place to discuss it with a group of WP editors who deal in this area