Why are there so many articles posted on HN about this? Want to live long and be productive exercise and eat mostly healthy must be common sense at this point r

Why are there so many articles posted on HN about this? Want to live long and be productive exercise and eat mostly healthy must be common sense at this point right? I'm not knocking on the OP for posting this but am interested in hearing comments on why this keeps getting repeated. I sure know that everyone around me on a day to day basis knows this independent of whether they follow it or not.