Genetically modifying humans is the main dish. The side and starter salad and desert dishes are as you say, increasing standard of living, educating about health in a promotional way, making folks less ignorant about their lifestyle choices. This only adds an extra decade or two. The main preparation work will take the longest because genetic modification is tricky and complicated with a great learning curve and many unpleasant consequences which have to be evolved through before the technology is ready. The “warrior gene” and the x-chromosome were the main areas our ancestors genetically modified us, their descendants, which reduced our life expectancy to a 120 year narrative cycle. So as I say the main area of interest is in genetic modification research, development and improvement.