Every single proponent and scientist working on longetivity aims at increasing the life quality also, along with lifespan. It's an obvious thing to do and to aim for, and everyone seriously working in the field does this already. They are not looking to make humans live 150 years at the 80-year-old life quality, they are looking to expand and extend the life quality, so that the same quality at 40, 50, 60 years etc - to last for longer, thus extending the overall range as well...
Every single proponent and scientist working on longetivity aims at increasing the life quality also, along with lifespan. It's an obvious thing to do and to aim for, and everyone seriously working in the field does this already. They are not looking to make humans live 150 years at the 80-year-old life quality, they are looking to expand and extend the life quality, so that the same quality at 40, 50, 60 years etc - to last for longer, thus extending the overall range as well...