If you're looking to keep people alive for long periods of time you necessarily have to work to address frailty because frailty kills. The sort of last ditch treatments to keep someone alive for another year or month you describe aren't really related to SENS's goals except in the broad sense that they're both keeping people alive.
I think you misunderstood the person you're replying to. They meant that people's lives should end well (not propped up on life support) and that we should focus more on quality of life than on life extension. There was a great article that went around a few years ago called "How Doctors Die"[1] that showed the difference between medical professionals approach death and how normal people approach it.
