This is a pretty naive viewpoint. Humans are social creatures, no matter how much some people try to convince others otherwise, and the fact is that much of the behavior and personality traits we identify oursleves with are formed and nurtured in no small part by the environment we live in and with out interactions with others. It's not about trying to assign responsibility to someone or something, it's about recognizing that external factors, whether it's your friends wanting to sit down and play Call of Duty rather than go outside and play basketball, McDonalds bombarding advertising channels with their products and subtly influencing your own desires, having to keep up with people you know on Facebook, and yes, continued consumption of outside stimuli that make you and your brain feel good, can lead to what may be considered to be undesirable behavior. We may be masters of our own body, but that's not going to stop our body from doing its damndest to get what it wants.
