Most people who go to the track are probaly there purely for the enjoyment of high speeds in a safe environment. Some go to acquire and develop racing skills, or to develop good riding habits that can be carried over safely to the street. Others may be there to tweak and tune their bike's performance while others simply take part as a way of socialising with their friends or meeting new people. All reasons are valid for going to a track day, there are no expectations of you when you attend other than to share the track according to the rules.
Anyone who has the slightest interest in doing a track day should try it at least once. Most people get far more out of the experience than they ever expected going into it.