I think the page makes a case that it is worth doing something about AI risk, and that SIAI is doing something. The page gives no one any reason to think that SIAI is doing better than anything else you could do about x-risk (there could be reasons elsewhere).

In this respect, the page is similar to other non-profit pages: (i) argue that there is a problem, (ii) argue that you're doing something to solve the problem, but don't (iii) try to show that you're solving the problem better than others. Maybe that's reasonable, since that rubs some donors the wrong way and is hard to establish that you're the best; but it doesn't advance our discussion about the best way to reduce x-risk.