I don't know if it's true, but even if it is, isn't that true of most classes? Clerics wearing armor and turning undead? Check. A wizard that specializes in illusion? Check. These traditions are what makes classes recognizable - arguably, to characters in the game, too.
Regarding rogues in general: it's not just an abstract category invented for the game. In the case I know best, that of Kievan Rus', a "rogue" (
izgoi, the term used in contemporary Russian to translate "rogue state", for example) was a social category defined in an 11th century law code. It referred to people who could not be placed into a clear social category (e.g. boyar, or peasant), and had no clear right to own land. In other words, an izgoi (rogue) was a member of a group that stood outside the law. A legal definition is not necessarily the same as an identity group, but laws are very powerful, if sometimes negative social mechanisms for forming social groups.
The English term is less clear-cut, though curiously, its etymology is itself derived from Thieves' Cant:
http://www.etymonline.com/index.php?term=rogue