This is a good description of what the Old Testament Jews, especially during the time that Ecclesiastes was written, believed.
Blessings in Christ,
KindredSoul
This is a good point, except that this was only one group of Jews. Others during the the OT and intertestamental period believed as we see in Maccabees in sacrifices for those who died to expiate their sins.
Ecclesiastes also needs to be understood in context. He is giving voice to much hopelessness and despair as well, expressing the state of humans in this frame of mind, not a doctrinal truth. Here is another example:
Eccl 4:1-3
4:1 Again I saw all the oppressions that are practiced under the sun. Look, the tears of the oppressed — with no one to comfort them! On the side of their oppressors there was power — with no one to comfort them. 2 And I thought the dead, who have already died, more fortunate than the living, who are still alive; 3 but better than both is the one who has not yet been, and has not seen the evil deeds that are done under the sun.
No Christian would claim that there is “no one to comfort them” when the are oppressed, or even a faithful Jew. But yet, many do feel isolated and lacking in comfort, because they are not under the shadow of Hiis wings.
The prophet here is speaking from a position of the soul in despair, he is not teaching doctrines of the faith.