What you are saying is that it may increase your odds of success, but it by no means guarantees it.
If you do nothing - you won't succeed. If you do everything - you may succeed.
If you do nothing - you won't succeed. If you do everything - you may succeed.
Life is a wide-ranging buffet of risks, just like the stock market. You can choose anywhere from bonds (career, stable job) to penny stocks (startups).