I know there are "warriors" and "wizards" in RPGs, but why do "bandits" come in? "Because it's a D&D flow" "Translation problem?"

I know there are "warriors" and "wizards" in RPGs, but why do "bandits" come in? "Because it's a D&D flow" "Translation problem?"
Kasuga @kasuga391 Seriously speaking, the D&D thief class, which is the origin of the RPG thief class, is based on the villain novel "Fafard & the Greymouser". D&D incorporates the setting of famous fantasy from the past without restraint, so it has a unique worldview that makes Aragorn, Frodo, Conan, and Greymouser travel together. x.co......

The linked article is in Japanese.