They didn't just bemoan the decline, they stated the precise condition (in their opinion) of LW prosperity. I personally believe that LW needs a hero, and it's necessary and sufficient condition. Someone, who'd basically repeat Yudkowsky's feat. But am I Yudkowsky, or even Luke Muehlhauser, level smart to fulfill that role? Hell no. But there's nothing bad in sharing my opinion, because maybe it would make other people rethink their actions and expectations.