In fact, the whole argument "you can be like a 1000 year old vampire" seems to amount to "life extension isn't all that great. You can do as well without it as you can with it. If you live your life properly, you have no need to live longer". I think that in any other context, people here would recognize that that is a pro-death position and should be fought.

WTF? Where did you get that? If our standard of charity says that is what OP says, it paraphrases your comment as "We don't have real life extension, so we shouldn't even try to live better because it doesn't solve the main problem". You didn't really mean that, though. Maybe you think I should have paid more lip service to the glory of real life extension? If so, buzz off; I had no need of that hypothesis.

Obviously both are wrong: we should try to live better and achieve life extension.