better nutrition and hygiene, and generally lower alcohol and tobacco consumption (in the West anyway) have slightly extended the total lifespan for people who

better nutrition and hygiene, and generally lower alcohol and tobacco consumption (in the West anyway) have slightly extended the total lifespan for people who don't die early of accidental or pathogenic deaths. however, you're still absolutely right that senescence is inevitable and we have very little, besides nutrition and exercise, that can do anything about it.