There are a wide variety of useful skills, on various levels of the scale of survival-to-success. I have such relevant to any level of society, from being alone on a desert island or in the middle of a jungle, to the heights of an industrial business world, or an aristocratic court in various cultures.

Sword fighting is useful, in some situations. [He has a fondness for it.] But it is a limited-use skill, all the same.