It makes sense. We know how to deworm. That is an execution problem. The ones I find more interesting are in planning stages, such as how to we fix or supersede capitalism, how do we mitigate climate change, how do we persuade people in power those things need to be done before the problem is so big it becomes intractable.
For the record, I don't think people like Musk, or, say, Andreesen or Altman are EAs themselves. But they are the kings picking court jesters like Yudkowsky who then have the resources to (re)define the movement.
(I would also say his influence has decreased a lot over that time, as he is writing much less now, and there are a lot of other voices on AI risk.)