In my opinion "you have to take the title from the champ" is essential to the sport. It means that if you want tp wrap the belt around your waist and shadowbox for the family in your mama's kitchen you need to give em a reason to hand it over.

If the bout is a draw the current champ should retain the title. If you don't turn the current champ's head into a yo-yo for 8 rounds and floor him once or twice in the process than the champ retains the title. The belt has greater meaning this way.

Otherwise three or four closely matched fighters could pass the belt back and forth in a few year's time. Boxing isn't American football were a schedule is handed out and 32 teams start fresh at the end of each season. You can't fight once a week for four months, blah, blah, blah...