You apparently have not read your Bible. Try reading Genesis, Exodus, Leviticus, Numbers, and Deuteronomy. Then come back to this forum and tell me God is not specific. For example, God gave specific instructions to Noah as to how to build the ark. God did not command Noah to build the ark but to do it as Noah saw fit. Because if God is not specific, a Catholic or an Orthodox priest can buy a bag of potato chips, consecrate them, and declare those chips are the Body of Christ. There is no Biblical precedent for consecration of potato chips. God gave His Chosen People specific instructions. And SPECIFICITY also applies to Christianity. Unfortunately, this is lost on many Christians.
You might like this article: What is a Nominal Christian?
at https://www.gotquestions.org/nominal-Christianity.html