Well for one, we weren't always sinners. Adam and Eve weren't sinners until they are the forbidden fruit. That's when evil entered into our world. You may live a good moral life to the world's standard, but all have sinned. All fall short of Gods glorious standard. But he offers us a way out of the coming punishment. But it's our choice whether we accept it or not. He didn't have to give us a chance. He could have let us die in our sin, but by his grace and mercy he gave his son. Now I am redeemed. This isn't fishy to me. It's amazing grace.