Children are indoctrinated into the religious, cultural, social mores of the parents. The education chosen for the child will significantly affect his ways of thinking and his opportunities in later life. The diet chosen, the environment in which he lives, whether or not his parents smoke, all are likely to have a significant influence on his future and well-being. Nevertheless, these responsibilities are borne lightly. People weigh up the pros and cons, take a measured decision and act for what they hope will be the best.
Life is uncertain and full of risk.
Most of the time we accept that risk - we still drive cars even though we know the relatively high chance of an accident. We trade that chance against the advantages of speedier and more convenient travel. In medicine, all drugs have side effects for some people. After rigorous trials, a drug is accepted for clinical use, even though it is known that its effect on some patients will be deleterious. And when we are that individual who is affected, we rail against the system, feel ourselves ill-used and demand compensation.