Yes people are a victim of circumstance sometimes but most often they create those circumstances with the choices they make every day.
I agree with this on an objective basis. Everything a person does is the result of a choice, which of course puts total responsibility for a person's success/failure on the person. And I would agree even more if each person had the same support, opportunity, intelligence, skill-set, education, encouragement. But we know that is not true. Evidence is pretty clear that the first 4-5 years of a person's life have a huge impact on the outcome of that person, and evidence also is pretty clear that if a child by the end of the 4th grade is not a good reader and not doing well in school, that child's success outcome is likely to be seriously impaired. So while choice is objective, the ability to make that choice clearly is not.
Once again, there are plenty of stories of remarkable success by persons coming out of the worst situations, as well as failure by persons coming out of the best of circumstances. In both cases, however, there are several orders of magnitude of more stories of crime, abuse, failure, poverty, etc. by persons coming out of the negative situations and of stories of success by persons coming out of the positive situations. Those stories prove nothing for those populations as a whole.
We all can be sure that XYZ breakfast cereal company would not spend $millions on advertising to toddlers (and adults) touting their sugary cereals if that advertising did not work to change choices. Or that ABC tobacco company (in the past) or beer company would not spend $millions on advertising to young people and young and old adults touting the benefits of their products if that advertising did not work to change choices. Think of what the result would be if XYZ company spent all that money on advertising very healthy foods, or if ABC company spent all that money on to support young families and early childhood education, to change the way people think about healthy foods, good child care, and quality education.
We can argue whether or not choices create the circumstances or circumstances create the choices. Some of both are true, but on a population wide basis, I would submit that circumstances have the greatest impact in affecting choices.