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Not according to God all of humanity are sinful beings and with just the right environment will let the sinful nature shine.
Why did God establish laws for man to live by, man (this person you seem to put faith in) certainty would have not established them himself.
Not a single man with out knowledge of The Bible could tell a person how to receive God's free gift of Eternal Life. But yet The Bible who has words of life, can not (according to you) accurately give mankind what God wants man to know about His creation. Not The Bible is not enough, so God needed to wait 1000's of years for the development of secular science to enlighten man on God's creation.
Now even with the knowledge of God and guidelines on how to live. Society is degrading and getting away from God and any belief in The God of The Bible. Many now are establishing their own beliefs with or with out a god as their belief, many not turn to government, science, corporations to give security and meaning to their lives. China as reported from a 2017 poll by Gallup is 91% atheist.
Jesus is God and knew their ever thoughts, and yet still they abandoned Jesus and even denied knowing Him. So much for the trustworthiness of man.