Man is spiritually dead,
Yes, we agree. When does a man become spiritually dead? It can't be before he's born, because scripture doesn't teach that.
born that way.
But you acknowledged that scripture doesn't say that.
So why are you promoting a belief that cannot be gleaned from scripture?
In Adam all died.
Christ died and took Adam's place, and paid for Adam's sin.
That's the whole point of Christ coming to die on the cross!