Dying is a natural process of the human body. Increased life expectancy is going to lead to problems down the line, just FYI, hope you're prepared because I am.
If my mother hadn't had her appendix removed when I was 11 or 12 she would be dead right now. Imagine if that was your mother.
Also, even if increased life expectancy is going to be a problem down the line eventually, you didn't even address the fact that most of our food comes from artificially bred organisms that would be impossible to find in the wild. There's presumably also many other examples of phenomena arising from the fact that us humans have augmented our reality that make our lives much better than otherwise.