I don't think you can call brook a quitter. With an injury like that, you know something is wrong. It can be like unlike anything you felt. (Except for brook, having already experienced it before with GGG). He only would have sustained more permanent damage and probably worse. When you're in a panic like that, even though your body is raging with with adrenaline to deal with the pain, it does nothing for the shortness of breath, and the vertigo you can experience as the swelling in the tissue surrounding your nasal cavities may start to close off your air passages and you start to breath through you mouth (hanging your jaw out there to be broken)

Whether or not the plate contributed to the injury, could have to do with who did the work. Usually the plates that people are thinking of are not what most people think. Its not some call inclusive Phantom of the Opera Shaped plate that has you looking like a mortal kombat/terminator mashup up freakshow under the skin. It more like small strip that is screwed in place bridging the break. Sometimes they may need to graft bone in order to have enough bone to anchor it to and stimulate bone growth with the implant for density. (if anyone had dental implants, its the same principle). There was a guy (Todd Fedoruk) in the NHL who Had implants on both sides after being separately smashed by two different heavyweights in 2 different incidents. He still went on to be an enforcer for a little bit before changing his game. You can see all the work done on him (light x shapes and bicycle chain Shapes) in the xray.



First plate: