Ding,
Great point. This is one of those elements of WT doctrine that JWs really don't want to think about.
If it was simply an *impersonal* "life force" that was transferred into the newly conceived Jesus, then how could it be said that the person Jesus was Michael at all? There was nothing *personal* exchanged between the two of them...
Further, if man (including the man Jesus) does not have a conscious and incorporeal spirit element, then Jesus truly ceased to exist for three days. If this is the case, then he was literally *recreated* as a brand new being after the third day, with nothing at all to link him to the previous being...
It's hard not to feel bad for the Jesus who walked on this earth... He's the one who suffered and died, and yet it's a brand new (and very underserving) Jesus who gets created from scratch and collects all the glory.
The real pain point for JWs in all this is that the same applies to them. JWs who die before the Big A are not *resurrected* in the New World™.... they are *recreated*....
In other words, the JW who lives and dies on this earth is not the same person who will live in Paradise.™ He might look the same, he might sound the same, but he's not the same. He is a facsimile of the original, a copy, with his own independent consciousness that is in NO WAY WHATSOEVER connected or related to the original person. This copy will live his own life and the original JW will know absolutely nothing about, because the original JW doesn't exist anymore. Just as the copy of Jesus is now reaping the rewards of the work done by the original Jesus, so the copy of the JW will reap the rewards of the work done by the original JW.