If you get fired, then what? Even if you don't find a new source of income, you're not going to starve. Only a few hundred people starve per year in the U.S. What's the big deal? It's all just psychological issues in your brain. Either way is actually fine.
My friend, you sound as if you've never been in the situation of having to find work or find yourself on the streets. I spent a few months out of work early last year, and got to the point where I had to stay with an Ex girlfriend while looking for work, because I couldn't afford to move away from town. At my age - 28 and with a Comp Sci degree- it is almost impossible to even get a job at McDonalds because they know that you will leave when something better comes up.
Regardless on if I would have starved or not, it was the most stressful and horrible time of my life. To say "what is the big deal" to me says you've never actually been in that position.
Thankfully, I eventually found an ok job, and am now taking that ex-girlfriend on an international holiday just to say thank you.
You are correct, most people would not starve; however, losing one's job is not something to be taken lightly. I imagine the following would be a very difficult conversation with your family: "Well, I just didn't quite feel like working today. As a result, I lost my job. You may have to go without many of the things I have previously worked so hard to get for this family, but at least everyone won't starve."
EDIT: Also, the issue of hunger in the United States is much more serious than you think.
