Not always. Jeanne Calment was once asked what the secret of her long life was and she said that she thought that cutting down her smoking at the age of 96 had a lot to do with it.
From the very same Wikipedia page
In 1896, at the age of 21, she married her double second cousin, Fernand Nicolas Calment, a wealthy store owner. (...) His wealth made it possible for Calment never to have to work; instead she led a leisured lifestyle, pursuing hobbies such as tennis, cycling, swimming, rollerskating, piano, and opera.
Don't you think it also helped ?