And yet the bible is literally filled with unregenerated people believing God . So it must mean your interpretation is wrong . If it said unregenerated people cannot believe the Gospel unless they are regenerated first you would have a point . Your adding the extra bit into ' cannot please God ,therefore must mean they can't believe God also .
8 So then they that are in the flesh cannot please God. Believing/Faith pleases God, so they who are in the flesh cannot believe/have Faith in God.