Darnit so close again. Come on Hino-san, kiss the girl already. Man this manga is such a tease.
And what kind of logic is: "What's the point of practicing self defence techniques, if you don't use them"? Imagine if people thought that way about nuclear weapons!
It’s perfectly good logic. Just because you know self defense techniques doesn’t mean you’ll be able to make use of them in a dangerous situation. Most people panic and can’t think straight. Martial artists train until their techniques become instinctual so that they aren’t distracted by trying to think about how to perform them mid fight.
The ideal mind set for defensive martial arts, nuclear weapons, and hand guns, for that matter, is to hope to never need to use them. You're suppose to exhaust every other possibility, before resorting to violence. To have the mind set, why have them, if you're not going to use them. is just looking for trouble.
As for martial arts training, sure you want to train to the level that the moves become instinctual, but I don't think M.A. instructors are sending there students into actual street brawls, to achieve that.