It is suprising how widespread this misconception is. ALL of (*ok maybe 99%) of "life extensionalists" or longevity enthusiasts are working on extending the us

It is suprising how widespread this misconception is. ALL of (*ok maybe 99%) of "life extensionalists" or longevity enthusiasts are working on extending the useful lifespan, not just the technical heartbeat-covering lifespan. This is a given. What they mean by extending the total lifespan is that it is done using integral methods, improving the overall health of a human, meaning that it will increase total lifespan also, but since it is working on the general health, it will also by extension increase the useful lifespan, because the health at every point in life will increase, and points which were not useful (healthy) before interventions would become useful. This is not something longevity people just "forget", there is no crusade for a mathematical birth-to-death age increase, these people are not stupid.