Your feeling of arrogance seems to be a product of a cultural programmed reaction. There's no shortage of movies, cultural works, and tv shows that tell us that immortality is unwanted, unattainable, selfish, or somehow otherwise bad, starting with our oldest myths and stories, Epic of Gilgamesh.

If the goal of medicine is to cure or prevent every diseases and dysfunction in the human body, then we must conclude that as an unavoidable side effect that being healthier will extend long life.

If we care about our fellow human beings, especially the elderly, then we do not want them to live in pain, to be in dementia, or otherwise have a poor quality of life. We must also recognize that many of them may not want to die.

I applaud the pursuit of longevity and health so long it is paired with the egalitarian outcome in that everybody will be entitled and receive it, regardless of who they are and what they did.