More seriously : with such mindset, mankind would not be where it is now. It's by pushing the limits that you access some higher "truth", be it tech innovation or societal rules.
There will always be a half of humans. Even if aging and all diseases are covered. Imagine someone getting their brain crushed in a car accident for example. Or a plain crash and everyone burned to ash in the wreckage. The only difference is how long is that period.