You have said too many things here. So I'll reply to a few.
1. Measurement is not the standard by which we come to know a thing exists. That is the role a theory, to explain the available evidence and tell us what exists and why?
2. The problem with faith has nothing all to do with evidence. The problem is what faith causes its hosts to do. You have faith that the silhouette on the wall isn't a lion? If you're wrong it'll eats you. You have faith that god will help all people living in poverty? If you're wrong they all die from some treatable disease. All I see in faith is death.
Do we have a soul?
This can neither be proven nor disproven.
1.) A theory that cannot be shown as a working model does not make it nonexistent was the point...we have string theory, QM, and a whole slew of “theories” of how things work. They can’t all be true...the answer is - we don’t know yet.
So to discount the existence of a soul when there has been loads of subjective evidence across the existence of humankind, is jumping the gun.
2.) All you chose to see in faith is death.
The shadow of a lion on the wall is reminiscent of Plato’s allegory of the cave.
People grow up seeing shadows on the wall of a cave will believe that is the real world, when if their perspective were to change and they turned to face the other way, they would see the true reality.
What our brain show’s us is a very limited version of actual reality...we see, hear, feel, etc. a very small spectrum of available information.
You don’t taste anything...your mind gives you the illusion of taste...it creates a whole virtual world in your skull that does not again, represent actual reality. Having faith and having faith in a God are two separate matters entirely.
I don’t personally believe that God interferes in anyone’s life, if God is actually there.
It would be a violation of free-will...to do good or evil.
But I don’t discount that intervention could indeed happen as well.
You don’t have to believe in God to have faith that there is something more than a meat computer on your shoulders and we are just acting out a set of preprogrammed algorithms that only give us the illusion of making a choice when the choice has already been made by our programming.
What would be the purpose of our brain tricking us into having the illusion of free choice?
It would be much easier, and would cause less internal conflict and cognizant dissonance if the choice was just done in an instinctual manner...so why have an illusion of choice at all?