Imagine having the responsibility of saving souls. How would you build your business model? Who would sit on the board? How would convince everyone this product is something they can't live without? Would you take the time to get to know your customer needs? How about fine-tuning your product to meet all of your customer needs? Would you use "social media" to communicate and receive feedback?
The answers lie as one interprets the Bible. God is the CEO. His angels are his board members. He sent prophets to spread the word. God assumed to much of his customers. Their needs were being supplied, however they took advantage. The "message/product" was getting lost in the shuffle. God had to re-think his strategy. He sent a special messenger. One that would listen to the needs of the people. One that would set up spreading the news, hence the Gospel. And yes, the product was tested and tested and tested. Eventually fine-tuned and designed to save souls for days to come.
All Scripture is inspired by God and is useful to teach us what is true and to make us realize what is wrong in our lives. It corrects us when we are wrong and teaches us to do what is right.