All boxers are hypocrites, its part of the deal to increase attention and sell tickets. When they say theyll never quit and will fight till the death, they probably dont actually mean it. Just part of the act.
You would have to be an imbecile to mean it in fairness. There are some boxers who are utterly mental and will keep going until they are stretchered out. Lots of boxers do need saving from themselves but few will actually 'fight to the death' and nor should they!
Anyway, saying Dubois 'quit' is nonsense and saying Saunders 'quit' is equally nonsense. I personally don't expect boxers to fight on to the point where they fuck up their career and/or lives. They risk enough by stepping into the ring.
Canelo is a druggy twat but no one up to and probably including 175 is beating him. Bivol didn't look great the other week for example.