As Bob said we are back to original post! But what fun.
I think you've got it !!! They are doing it all for fun

Yes, got it a long time ago
Still bugs me people playing with real people on their trees, especially my ancestors. This reincarnation is fantasy just a laugh. Anyway thats enough of that it's only my opinion that it's wrong. I can get over it.
Jane
Yes, fun, has anyone been reincarnated from a common person such as an Ag Lab rather than a king or pope etc.?
Perhaps it is a privilege of the upper classes and what happens if you were a trout and got eaten would you still have been reincarnated.
Just like family history the answers lead to more questions.
In a similar vein when Morphing software first became available I spent hours experimenting with different family photos seeing the effects of morphing the pictures of the two parents (and grandparents etc.) to see if I could generate likenesses of their children.
Again just fun but interesting.
Cheers
Guy