Because of your paradigm . All you are seeing is . " The unsaved man cannot believe the Gospel unless he's zapped first " There is no verses that says this ,so calvinism has taken 1 cor 2.14 ever since and most assume this is talking about a lost man . And ' spiritual ' has been twisted to mean " man has Holy Spirit ' instead of ' mature ' . Then we read in just a few verses along The immature believer cannot understand the things of the Spirit and I'm the idiot? So we have 3 people. This Random non sequitur in verse 14 . But Chapter 3 literally says the same thing about believers not understanding the things of the Spirit and being unable. I realise ' the natural man ' is the most used verse in Christianity ' but Paul is not saying " the unsaved cannot believe the Gospel .When you were first born into this world were you ABLE to understand everything about life? No! I don't think so. You had to listen to your parents and gradually learn the things of life. Were you quickened to a natural life? Yes! In the same manner, the natural man has to be quickened to a spiritual life, before he can gradually grow to maturity, by listening to the word of God being preached, and reading the scriptures himself to see if what the preacher said was true.
I, honestly, can not understand why you can not get this simple fact straight in your mind.
You are so dogmatic about disproving Calvinism wrong that your mind is blocked to any constructive information.