Colonel, I am not versed in RV.
But from my perspective, as a physician, and from what I have seen/experienced, it seems that everything starts at an energetic level.
I have a condition (nothing serious) that has a perfect medical explanation and science describes it. My brother also has it and my grandpa might have had it (something similar).
Of course, genetics explain it.
But I did a hypnosis session and there was a mind blowing explanation regarding some past lives.
I don't know if you are asking for yourself, but maybe it is also interesting to view it from another perspective.