were the death rattles good for something?

[king of nowhere]

people near death saw glimpses of the future. the silent gatherers collected thousands such death rattles for the purpose of informing the diagram.

and yet, none of those rattles were in any way clear. even us, with the benefit of knowing all the plots, can only figure out the meaning after the fact happened. much less try to use the rattle to influence the events in an informed way.

so, besides the general vague feeling of dread and imminent catastrophe pushing for the need to act, was there any actually useful information that the death rattles did provide to the diagram?