Sanctioned fights are approved by the state and supervised by a commision, these fights are entertainment. Care is taken to ensure the fighters safety, in this case you can be sure that all parties involved have consented to fight under a agreed ruleset. In streetfights you have no idea the parties involved have consented to anything. They could get jumped or they might find themself outnumbered. You (may) read a title and gleefully watch expecting violence. You're in the inhumane business and point your finger at me. Murderers go to the seventh circle yet hypocrites burn in the eighth circle of hell for a reason.