Who thinks that an army is unnecessary?

Even without an army, it's useful. What will you do if you run into some thugs in an alley?

It's unlikely that physical fitness alone will save you from thugs. It didn't save me, for example, when there were three of them against one. I spent a week in the hospital. In this case, you need a certain level of detachment, which is a useful quality for dangerous neighborhoods, but it can make it difficult to communicate with relatively intellectually developed people.
By the way, this NickBlond is doing a very good job of demonstrating how to troll - he made the initial post, and now you've been arguing with each other for three pages. Well done, I approve.