Reason why so many idols are bullies

Obviously most people become idols because they either want to be become celebrities, they like fame or have a talent and want to express it through a glamorous industry. But there's also many "iljins" or "delinquents" that get into the industry. They may have looks, or be good at dancing or rapping, which helped them join a group. But the reason they try to join a kpop group is because they know the "do gooder" life of studying day and night, working at an office non-stop is not for them. They enjoyed drinking, smoking, partying as kids. After a couple of years of making money as an idol they can easily go back to that lifestyle because it runs in similar circles. Seungri is a typical example of this.