The whole concept you have constructed is contradictory. Which is probably why you are unable to produce an example of a spiritual pursuit that is not related to a higher power or spirit of some sort which is what you claimed in post #109.There is no sprit that gets reborn. There is no soul, no self, no ego.
The contradictions that exist in all things are more an artifact of the deficiency of translation and the failure to grasp some of the more esoteric meanings of the same word in different cultures. You stick to your definition of rebirth as if a definition or use of a word never changes. But in reality we see that definitions are as impermanent as everything else and that is compounded by imperfect translations of both definitions both denotive and connotative
In my studies I have heard different interpretations.
Some say it is remnants of consciousness that get reborn but the problem there is that consciousness is impermanent.
Some say that your actions, patterns of behavior and thoughts leave impressions on your constituent atoms much like a tool leaves unique marks on an object or the barrel of a gun leaves rifling marks on a bullet and it is these small but unique patterns that are carried to the next being or object that will eventually incorporate what was once your physical body.
That last one seems to me to be the least contradictive.