adversities and insurances

Growing up, i knew that my parents don't have insurance because i know for a fact that they cannot afford the monthly stipend then. Later in life, one of my close friends lost her mother to heart attack. I was there as she hurdle the struggle of losing a mother. She told me that even when their mother is no longer around, she still took care of them. Their mother didn't let them worry about monitory expenses because her mother obtained term life insurance to make sure everything is taken cared of if anything happens. I understand that adversities in life may happen, it is just befitting to prepare for it. We never want to leave our loved ones hanging. Would we?