Read Isaac Asimov's The Last Answer: https://www.highexistence.com/the-last-answer-short-story/
But living as a human, you can do so much more than just thinking.
Still, curing aging doesn't mean defeating death. There's infinite ways it can end for you, and aging is just one of them (not a great one, in my opinion).
My take is that current lifespans are way too short, and at the very least people should be able to halt their aging. And when they want to go, they should be allowed to.