It depends on the context (probability distribution over number and locations and types of lives), with various complications I didn't want to get into in a short comment.
Here's a different way of phrasing things: if I could trade off probability p1 of increasing the income of everyone alive today (but not providing lasting benefits into the far future) to at least $1,000 per annum with basic Western medicine for control of infectious disease, against probability p2 of a great long-term posthuman future with colonization, I would prefer p2 even if it was many times smaller than p1. Note that those in absolute poverty are a minority of current people, a tiny minority of the people who have lived on Earth so far, their life expectancy is a large fraction of that of the rich, and so forth.
Why does SI/LW focus so much on AI-FOOM disaster, with apparently much less concern for things like
Why, for example, is lukeprog's strategy sequence titled "AI Risk and Opportunity", instead of "The Singularity, Risks and Opportunities"? Doesn't it seem strange to assume that both the risks and opportunities must be AI related, before the analysis even begins? Given our current state of knowledge, I don't see how we can make such conclusions with any confidence even after a thorough analysis.
SI/LW sometimes gives the impression of being a doomsday cult, and it would help if we didn't concentrate so much on a particular doomsday scenario. (Are there any doomsday cults that say "doom is probably coming, we're not sure how but here are some likely possibilities"?)