Boxing matches used to go on for hours until somebody dropped. Thats why the 15 round rule was put in place after things got organized. So they only reduced it from 15 to 12 because they thought it would be better for the fighter? So instead of fighting 4 fights all the way thru to get 60 rounds of punishment you now have to fight 5 fights all the way. If the cobb/holmes fight was that onesided they should've stopped it thats what referee's are there for. Maybe one day some research will come around that says "Hey it doesn't matter how long the rounds are because some people die before they even have an amateur fight from blunt force trauma in sparring and Others can fight 70 some fights including some 15 rounders and walk away without any longer term issues." Next thing you know they'll reduce it to 10 rounds and require amatuer headgear for protection. It all comes down to the number one rule "Protect yourself at all times".