Imagine if Obama wrote "How to Be a Successful Presidential Candidate" and every 2016 candidate read it and adopted it to a tee. We'd still have dozens of failures and only 1 success.
If success were really a formula, then we'd all be successful. We can't all get into harvard, we can't all be wealthy, we can't all be movies stars. We can't all win the game of musical chairs.
It's like the "how to become a millionaire" books. If we all followed their advice, nothing would change because the market has only room for X number of millionaires. And if it worked and we all became millionaires, being a millionaire would become meaningless.
At the end of the day, hard work, contacts and luck leads to success. The older I get, the more I realize that the latter two is far more important than the first criteria.