What do you wish that everybody knew?
Everyone should know their baseline mortality risk (you can look it up in an actuarial table) and the risks of common activities, and then assess risk in their lives accordingly. Very few decisions you make are as dangerous as your decision to get in a car every day, yet people obsess and agonize over far smaller risks. Rationally if you get in that car, by revealed preference you ought to be okay with a wide range of other risky activities as well.