Over consumption of fried foods tends to contribute to individuals gaining excessive weight. Some scientific studied suggest that individuals who are genetically predisposed to obesity are more likely to gain weight when they eat fried foods. If South Koreans visit these fried chicken restaurants often enough, then it is very likely that the obesity rate in South Korea will definitely increase.
While the number of fried chicken restaurants is concerning, I don't feel that it is a direct marker of how much obesity there will be. People do not have to stop at the restaurants if they don't want to. I would be much more concerned about the amount of time people spend sitting, which
is much more widespread due to the internet being so readily available and fast. Finally, if people stop only occasionally, it should not harm their diets too much.
The main reasons for obesity are overeating or not excising. Just because they have a lot of fried chicken doesn't mean they are setting themselves up for obesity. As long as people are smart and don't over eat then obesity won't be a problem. With everything the problem has multiple causes and can't be blamed on one thing.
South Koreans are not setting themselves up for an obesity problem because of the number of the fried chicken restaurants they have. This is yet another example of scaremongering and trying to create problems where none exist. In instances like this one only needs to follow the money to see where the real concern lies.