Dan_AZ is a product of public school indoctrination. Using your logic, we would not need, food, medicine, clothing or shelter. God should have made man completely self-sufficient without the use of anything else. Brilliant Dan, effing brilliant!
Here's a little clue: what the Founders recognized in the Declaration and then the Constitution is that man, as a Divine Creation, has certain rights that no other man can deny. Among these is life; that is, the God-given right to self preservation. If someone seeks to take your life, you have the right to defend it with all the force that is necessary to do so. You won't hear that in public school, but that's basic American History (now known as socialist studies).