As with everything, it seems a balance would be ideal. Learning some of those skills would be useful in the event things go to shit, but hooefully humans can continue being a productive race who do more than just live to survive.
Discussion
Most people live in cities, now, and I doubt that will change.
There will be a bit of urban farming (and more power to them!), but I doubt all 14 million residents of Tokio will go out to the country and farm rice and fish.
