Lighter gloves do not cause deaths or injuries. They changed it from 6oz for below featherweight to 8oz in 1991 as a knee-jerk response to a head injury and coma 'Akeem Anifowoshe' got. I remember seeing Cho Hi vs Daichi Sakoda(200, they were landing full force at some times and neither went down. Cho Hi died from the fight. Changing the gloves to 8oz didn't save anyone. You could even say if the gloves were smaller, one of them might have been knocked out earlier and Cho Hi would not have taken all the punishment that killed him.

You could also say that that is only speculation, but so is the theory that smaller gloves are dangerous. It's all speculation. So instead of basing the glove size on complete guesswork about which one is safe or not, base it on entertainment. Smaller gloves = faster, harder punching = more entertaining.

I also watched video of "Masaki Sawanaga" dying in the ring. Again they were using 8oz gloves. Again it didn't save him.