It is much harder for some people to grow their own food than others (for example, people who live in the city) but growing your own food can be healthier, cheaper and can become a fun and relaxing hobby for some. When you grow your own food, you know where it came from.
I feel it is really up to the American whether or not they should grow their own food. While I do feel it will save them money in the long run, it can also be very time consuming and take away things that must be done. Such as, your full time job, taking care of your family, and your social life.