Campbell v Barrera's cut

I have just watched Bradley v Campbell and although i'm a fan of Campbell, i love all the little tricks an old school fighter like him brings, i was very dissapointed with the way in which he quitted against Bradley. Compare Campbells cut with the one Barrera suffered against Khan earlier this year and it was barely a scratch. During that fight the doctor examined Barrera and would, like the rest of us, clearly seen that Marco was unable to see out of his eye. Marco could have pissed and moaned like Campbell but didnt and was allowed to continue until the fith of course allowing Khan an unfair win. Point is Campbell imo could have continued but wanted a way out. Pointless thread? Maybe. Just pointing out different attitudes fighters have. Barrera=Warrior Cambell=Quitter!!!