Are wanderers still needed and if not, why did we come here?

[Reaper]

 I could be wrong about this, but it seems to moi that the principle hitch in accepting the dark depths in that awesome creature in the mirror looking back at you (as well in accepting the supernal elements) is what can become a crushing feeling of vulnerability.  

That is correct. It is the fear of that vulnerability that tends to drive one to the dark side in the first place, which is a bit ironic, considering that the annihilating quality of the Abyss is the ultimate manifestation of negative polarity. To cross the Abyss takes enormous courage indeed, as it's never certain what will emerge on the other side, if one emerges at all. It is, however, the work that we all face at some point.