Let's not be hypocritical. A child can tell you what we do in a dojo. Regardless of the style - we practice self-defense in pairs. One person attacks and the other defends himself. Nothing else. No other physical activity shows self-defence better. Just like in a fairy tale by H.Ch. Andersen - 'The Emperor is naked'. .
Maciek, I must say your definition of self defense is on the level of 5 years old kid