I don't really know what people mean when they try to compare "capabilities advancements" to "safety advancements". In one sense, its pretty clear. The common units are "amount of time", so we should compare the marginal (probablistic) difference between time-to-alignment and time-to-doom. But I think practically people just look at vibes.
For example, if someone releases a new open source model people say that's a capabilities advance, and should not have been done. Yet I think there's a pretty good case that more well-trained open source models are better for time-to-alignment than for time-to-doom, since much alignment work ends up being done with them, and the marginal capabilities advance here is zero. Such work builds on the public state of the art, but not the private state of the art, which is probably far more advanced.
I also don't often see people making estimates of the time-wise differential impacts here. Maybe people think such things would be exfo/info-hazardous, but nobody even claims to have estimates here when the topic comes up (even in private, though people are glad to talk about their hunches for what AI will look like in 5 years, or the types of advancements necessary for AGI), despite all the work on timelines. Its difficult to do this for the marginal advance, but not so much for larger research priorities, which are the sorts of things people should be focusing on anyway.
This seems contrary to how much of science works. I expect if people stopped talking publicly about what they're working on in alignment, we'd make much less progress, and capabilities would basically run business as usual.
The sort of reasoning you use here, and that my only response to it basically amounts to "well, no I think you're wrong. This proposal will slow down alignment too much" is why I think we need numbers to ground us.