The Importance of the Yom Kippur Sacrifices

My impression is that the Yom Kippur sacrifices are not offered for corporate sins. Things like theft or lying or adultery aren't corporate sins, because those are committed by individuals. And so it is a more general sacrifice in that it's not offered on behalf of an individual worshiper. But you're quite right in saying that these weren't done with a view toward obtaining eternal life. It seems like an easy way out, actually.