Insurances calculate different age group % of death. For example 20-30 age 0.1%, 60-60 7%, and etc...
Of course, insurances pay someone. I have a friend's relative who bought a term life insurance just one week, he got car accident. Insurance paid. He only paid insurance $12 and insurance paid his family $100,000.
To answer your question, nobody knows that you belong to the small % or large %. You buy term life insurance for your love one, your family.
My suggestion: if you still have large portion of your mortgage, buy it. Otherwise, your family must move out, if they are unable to make mortgage payment.
