Anyone can have security by living very safely within their means, by learning how to be satisfied. What people really mean when they say what you are proposing, is “guarantee a certain future lifestyle”. But the appeal of future lifestyles depends on not obtaining them. Without an ability to be satisfied, acquisition is always disappointing. It’s why a pay raise in a job that doesn’t address your needs, loses its shine after a month or so.
As someone who has experienced family adversity in my life (health, disability) I couldn’t disagree with you more.
Things happen. Expensive things. The security to be able to afford expansive cancer care without worry, to pay for therapy and specialized schooling for your child… these are huge, huge things and they happen to you (or your children, or your children’s children) no matter what you do or don’t do. This isn’t just about being happy to be frugal.