My reply was semi sarcastic, and targeted at the assumption that being old equals having a useless life. TFA states that most of the elderly still enjoy being

My reply was semi sarcastic, and targeted at the assumption that being old equals having a useless life. TFA states that most of the elderly still enjoy being part of a community and contributing to it, sharing their time and the food they grow. So in addition to being healthy and active, they have some kind of beneficial peer pressure to take part in the community. I doubt you'd get the same feeling of happiness and belonging by taking a daily dose of anti-depressants, but I have no experience with those. As for being alive, there's more to it than merely being not-dead :-) I must admit I reacted mainly to the "ineffectual life" part of the comment which, to me, sounded like "they're not building a startup or trying to send people to Mars so it's useless", but there's a good chance I misinterpreted that part of the comment.