The history of our lives is defined through a series of reactions we like to call choices. The way we react is a direct result of exposure to previous circumstances that helped us establish a log of contextual discriminations that we will then use to make future choices in our life. It is highly probable that if we were exposed to a different set of circumstances (like being born some where different) and encountered a similar situation, the choice we would have made would be different than the one we made in our current lives. Thought it is highly difficult to know this for sure.
Belief in the deterministic view of life has a significant amount of challenges. Would a criminal still have committed a murder if they had better parents? This challenges the very core of morality because humans, generally speaking, are obsessed with blame. The biggest motivational and religious speakers will use blame to get their various messages across. Whether it is blaming sin, lack of vision, or passion; blame seems to be a primary motivational tool. Many religions will go so far to condemn people to an eternal after life of suffering based on the reactions they have in this life. We want to believe we have an extraordinarily large amount of control over our lives and to confirm this illusion we must blame others for their improper reactions. It takes exceptional types of human to publicly say that a rapist or murderer should still be treated like a human being because they are merely victims of circumstance.
There are some that believe that a deterministic view of life would undermine human society. That even if determinism is true, if it is public knowledge, people will use it as an excuse to commit crimes. However, people use far lesser excuses to commit crimes. It is a vicious circle because even the people who commit crimes want to believe they have free will and in doing so will also blame themselves before taking a more objective stance or view of their life. Determinism would require a psychological shift in humanity but would resolve a lot of existential as well as moral issues.
If we are a product of circumstance that means every blessing we have received is like winning the lottery. Any time we experience any joy at all it means a large amount of circumstances, that are beyond our control, lined up in order to make the event that brings us pleasure occur. In this situation envy ceases to exist and all pleasure derived from life becomes miraculous under the context of determinism.