I think that Self defense should be included, for two reasons that are not about self defense.

The first advantage of taking self defense on a regular basis is exercise.. This will allow you to be able to run for cover faster. Being physically fit will enable you to handle what ever rigors occur during a survival situation.

The second advantage is Confidence.. Just having the confidence to that you can handle things (whether real or imaginary.) This confidence I believe will help to dissuade attackers. People who prey upon people who are easy targets. Inner confidence can prevent a lot of issues.

Just my thoughts on the subject