Messy practical reasons.
I agree with Larks that most of us would press a magic button to slow down AI progress on dangerous paths.
But we can't, which raises two problems:
- Tractability.
- Effectiveness of moderate success. If you get a non-global slowdown, or a slowdown that ends too early, or a slowdown regime that's evadable, or if you differentially slow cautious labs, or even if you just differentially slow leading labs, the effect is likely net-negative. (Increasing multipolarity among labs + differentially boosting less-cautious actors +
compute overhangenabling rapidly scaling up training compute. See Slowing AI: Foundations.)
(I'd be excited to talk about proposals more specific than 'push for a pause,' or outcomes more specific than 'pause until proven <0.1% doom.' Who is doing the pausing; what are the rules? Or maybe you don't have specific proposals/outcomes in mind, in which case I support you searching for new great ideas, but it's not like others haven't tried and failed already.)
There's a big gap between "believe we should press it if presented with a magic global pause button" and "think pro-pause advocacy is the most efficient use of their time on the current margin". I suspect the majority of Xrisk-concerned EAs would press such a button if given the chance.
You can run a poll to try to find out the answer to 1) if you want!