Sadly, there is way, way, way too much money in AGI, and the promise of AGI, for people to actually take a step back and understand the implications of what they are doing in the short, medium, or long term.
I'm bullish on the ai aging case though, regenerative medicine has a massive manpower issue, so even sub-ASI robotic labwork should be able to appreciably move the needle.
Third world countries have lower average life expectancies because infant mortality is higher; many more children die before age 5. But the life expectancy at age 5 in third world countries is not much different to the life expectancy at age 5 in America.
I don't see why being able to do this would necessitate being able to cure all diseases or a comparable good outcome.
Yes, but neither do I see why an AGI should do the opposite. The arguments about an AGI that drives us to extinction do sound like projection to me. People extrapolate from human behaviour how a superintelligence will behave, assuming that what seems rational to us is also rational to AI. A lot of the described scenarios of malicious AI do more read like a natural history of human behaviour.