I have a feeling a lot of discussions of life extension suffer from being conditioned on the implicit set point of what's normal now.
Let's imagine that humans are actually replicants and their lifespan runs out in their 40s. That lifespan has a "control dial" and you can turn it to extend the human average life expectancy into the 80s. Would all your arguments apply and construct a case against meddling with that control dial?
Huh? It feels like you're responding to a common thing people say, but not to anything I've said (or believe).
If it's worth saying, but not worth its own post (even in Discussion), then it goes here.
Notes for future OT posters:
1. Please add the 'open_thread' tag.
2. Check if there is an active Open Thread before posting a new one. (Immediately before; refresh the list-of-threads page before posting.)
3. Open Threads should be posted in Discussion, and not Main.
4. Open Threads should start on Monday, and end on Sunday.