Why would someone in their 40s need life insurance more then someone in their 70s?

If you are in your 40's you may have different life insurance needs than someone who is in their 70's.People in their 40's may have more financial responsibilities, such as, young children at home, own a house with a mortgage, and have less savings than someone in their 70's.While a person in their 70's may have their home mortgage paid off, their kids grown and on their own, and have more money