Oh no! Please, can you be so kind as to read this part of the post again :)

Does that mean they are determined to live a life of low subjective well-being that is 10% dictated by life circumstances and 50% by genetics? Well, not according to this model, which leaves us with 40% of intentional activities. And this is where we can become proactive and take responsibility for our own well-being. This refers to us engaging, and committing to practices in life that will result in improved levels of happiness and mental-health. It counterbalances hedonic adaptation and delivers the means for us to change our levels of overall satisfaction beyond what is pre-set biologically and imposed by circumstances in life.

Hopefully this will help to change your understanding towards the positive message this study has brought :)