Government is a formal process by which society organizes issues and makes policies so that society can exist in a more orderly manner for the best interests of the most.
Government is made up of people. Those people have jobs. They do many things that the rest of us either choose not to do or can't do for ourselves.
The people in the government build infrastructure. Roads, bridges, airports, etc. They enforce regulations that promote safe food, drugs, and commerce. They enforce the laws that society agrees on so that society may be safer. We cannot reasonably build our own roads, regulate air travel, or assure our own safe water or pure food or drugs.
Wherever there is more than one person, some form of governmental process and structure will necessarily exist. Some governments are elected through a process that approximates democracy. Some governments are imposed by force. Some are more egalitarian, and some are more authoritarian. But in all societies, there is some form of government. Those who suggest that government should be irrelevant do not understand.