I agree with Robin Hanson. I'd go further and say this smells like unsubstantiated self-help in disguise.

It's interesting that Hanson's wife, who also works with dying people, cannot recall a single patient spontaneously expressing a general life regret. This suggests that Bronnie Ware asked the patients what their greatest regrets were.

For one thing, this strikes me as a bit mean. Of all the things that you could ask a dying person in their last days or weeks of life, why ask them what their regrets were? If you care about their welfare, there are better questions you could ask.

On another note, there is a good chance that her questions were leading questions. Or that the responses Ware received have been filtered through her own worldview.

If you give some thought to these comments, they are largely meaningless. What does it mean to "live a life true to myself"? What does it mean to have "the courage to express my feelings"? Is it really true that you can simply let yourself be happier?