There are a number of acute injuries that happen in boxing. But the chronic injuries, such as with the brain, are actually very rarely seen these days. If boxing is banned it would be pushed underground and would be incredibly difficult to administer, risking even more injury to fighters. Boxers are often from underprivileged backgrounds and it provides discipline, dietary improvements, and keeps many fighters away from temptations such as alcohol and drugs. But from a moral point of view, it is up to each individual to decide their own direction.
Nobody is pushed into the ring.
There is no safe level of boxing. Any blow to the head is harmful. Head injuries are the most serious concern. The medical staff can deal with a blood clot but the real answer must surely be prevention. Stopping boxing would prevent exposure to chronic brain damage, which would ultimately save many other boxers' lives.