The most important reason anyone is an atheist

[The Reality Salesman01]

That doesn't make any sense. Give examples. Don't just say things are "not working" thus-GOD. In your analogy we can easily understand what's wrong with the horse. There is evidence. Prove that people have souls, and marshal out your evidence that some people are weaker due to theirs having a lack of nourishment. If you can't do that, your analogy fails to be useful. Remember, it has to make sense to everyone. Not just you.