What is the purpose of life insurance? do you think everyone needs life insurance? explain?

The purpose of life insurance is to deter some of the costs associated with debt and death. For example, someone may die with 20,000 dollars in credit card debt. On top of that, the cost of funeral and other death related expenses may be 15,000 dollars. So this persons family may be left to come up with 35,000 dollars in money to cover the deads expenses. Most people cannot afford this. This is the value of life insurance. I do feel like everyone should have life insurance, but most people think they cannot afford it.