Those who propose to ban boxing believe that boxing causes the eye and brain injuries. They occur because of repeated punches to the head. These injuries may go unnoticed at the time, but cause the boxer serious problems in later life. There are very few professional fighters whose brains end up unscathed by the end of their career.
On the other hand, the proponents of boxing asserts that boxing requires a high degree of physical fitness, if you wish to be successful, so it teaches young people to look after their bodies. In addition, the sport teaches discipline. As well as things like exercise