They cannot even save themselves from the power of the flame. That is all they can do for you - these you have laboured with and trafficked with since childhood. Astrologers, whom Isaiah defines as 'stargazers who make predictions, month by month', are condemned. Their predictions have their hearers running around trying to respond to what they have heard. They only succeed in wearing themselves out.
Astrologers are in error and are condemned.
Despite this warning, the Israelites pay little account of this for we are told in Jeremiah chapter 8 that God believes that the bones of past kings of Israel should be dug up and put out in the open. This acceptance of astrology and star worship by the Jews is partly due to the mysticism of the sky. There is a thin dividing line between being in awe, and worshipping. It is also due in part to the importing of foreign cultures, the bane of the Jewish religion. Archaeology reveals to us that celestial worship was common place.