In every single society there are different individuals that have different personalities. They have different level of intelligence and they have different thoughts. Yes, everyone is different, and that is how companies pick their choice when hiring new employees.
In interviews, Nature vs Nurture is important. Considering that nurtural decision are important when it becomes to interview there are still natural decision made. For example, the race. The employment-population ratios shown below between races. The white people have higher employment ratio compared to black people.
There are many factors that interviewer glance before accepting employees. Most parts are due to one’s intelligence and personality. But there cases where the Natural approaches that might affect your interview negatively. For example race and gender. There is an invisible barrier in between the two factors.