Note that Shaping the Singularity was taken as the same task as averting human extinction. The talk of AI is secondary, it comes up because many of us think that AI can offer good solutions. In looking at AI, it also seems apparent that AI is itself an existential threat.
Is shaping the singularity the same as averting human extinction? If the singularity itself poses existential risks (this seems obvious,) and if extinction is inevitable without a singularity (this seems likely,) then we need a singularity that is 'safe and soon'. (though the initial wording does seem to gloss over the need to not go extinct in modern ways.)
Put another way: We can do the most work with the most powerful tools. There is a great need to use very powerful tools correctly. If we can even maybe influence the work done by highly powerful mid-singularity tools, we can accomplish far more 'correct work' than we could just using our modern tools. (Again, this does require that we survive long enough for the singularity to happen, and that you don't have a strong discount for future vs. present utility.)
Personally, I think creating a super-tool which can only be used correctly is the best approach.