There doesn't seem to be any emperical evidence that there is any such thing as a "spirit" - all of your "compelling evidence" seems like nothing more then your opinion and personal observations...
No, there is likely no classical empirical evidence of our spirit.
Therefore our spirit does not exist ... right?
No.
If we were talking about atoms and asteroids, then lack of empirical evidence is of value.
But the lack of that which is material to participate in the provision of empirical evidence of the spiritual is irrelevant to the ontological experience of one's self.
The being which each of us is transcends our empirically detectable material.
When we say "I am" we aren't talking about our matter in whole or in part, we're talking about our entity as a being, upon which it is impossible to put our finger.
I can't help but wonder if your reluctance to accept the spiritual is due to abuse at the hands of the religious, the religious who know not that of which they speak.
Perhaps, though, we may one day find a way of discerning the spirit empirically. We know now that sub-atomic particles emit a wave of massless energy. We also know now that sub-atomic quantum mechanical processes of a very special nature are at work in the brain.
Perhaps it's only a matter of time before we can link the physical to the non-physical.
In the meantime, does it really matter?
After all, no one's going anywhere -- when we biologically die, quantum mechanics strongly suggests that we spiritually die as well.
And that thought can be pretty scary ... scary enough to cause denial of the very existence of that which we are.