Nuclear bombs are released. The world as we know it is over. You were lucky enough to have survived, either you were far enough from the nearest blast or you happened to be in a building that isolated you from the fallout. Law and order is non-existent. People scavenge for food and supplies.
You are out walking one day and you see a small child. The child is alone, and looks tired and week. They have likely not eaten for days. You have one can of safe food left, but you know you can find more, so you give it to the child. The child is ecstatic and runs off towards, you assume, their shelter. You smile and turn to do the same, but you stop suddenly when you hear a scream. You run towards it, and see the same child. He is being attacked by a man who wants their food, but the man does not stop upon taking the food, he continues to beat the child.
Now for the choose your own adventure part.
You watch in horror. There is no one else nearby. The child will likely die if you do not intervene, but you never learned to fight and the man is clearly stronger than you are, so if you intervene, he may very well kill both of you.
You have never been in a street fight, but you did take a form of martial art in order to prepare yourself for just this moment. You rush in to help the child. You use only enough force that is necessary until the man runs or is unable to continue fighting. The child is injured, but with proper care, will be fine. You take them to safety.
I am by no means a great fighter, though I have taken about two and a half years of various martial arts forms (and I intend to take more once I am able). I have been attacked though….twice. Both times would have likely resulted in sexual assault had I not been previously trained to keep my head and react as necessary. Both times I walked away safe. The first time there was a bit of a struggle before I managed to escape to a public area, the second time I only needed to show the slightest bit of ability before the man was scared off and left the scene. I have several friends who have not been so lucky.
There are still many within the community that hold to the idea that Jedi do not need to learn how to fight. Perhaps it is a stance of pacifism, perhaps it is fear, perhaps it is another reason entirely. Learning how to fight does not mean one NEEDS to fight however. A proper martial art sharpens the mind and spirit as well as the body, and you are encouraged to only fight when necessary. Learning how to fight means that you know what to do IF you are ever in a situation that demands that you do, if you need to protect yourself, or someone else. It is the duty of the Jedi to serve and protect. It is therefore the duty of the Jedi to prepare themselves the best they can in order to serve and protect in any situation. When I say that Jedi should learn how to fight…it is not for some silly tradition, it is not because my standards are set impossibly high, it is because I do not want to see anyone injured, murdered, raped…if any of us are in a position to prevent it.