I see… To be clear, this is maybe less philosophical and more political; the symmetry is probably a historical coincidence, not a function of the workings of the universe itself.
Like you, the inward-looking powers are generally wrestling with the scars left by earlier contacts. I’m not sure even Rebirth would sharpen the pain the Caldari feel over the loss of Caldari Prime any further, for example; they’re kinda raised on it. New souls might not have the memories, but they’re that much more easily shaped and etched for just that reason.
Although, come to that, a contest between sufferers over who’s in more pain seems like a pretty useless competition anyway.