You can believe anything you want. But Genesis 5:3 says what it says. Take it up with God if you’re not happy with it. IF Adam and Eve had had children BEFORE they sinned, then yes, your argument would have merit. But that is not what happened. Not only that, we are NOT created. We are begotten. Adam and Eve were created.
Can you give me the Scripture verses to prove your take on this?
How do you know your interpretation is correct and mine is not? [This demonstrates exactly why God founded a Church. ;-)]
Also, how could Adam and Eve have been perfect? Only God is perfect. IF they had been perfect, they would not have chosen to sin.