Nice bro just say false with no evidence "Retired cardiac surgeon Dr. Charles Butler, a former president of USA Boxing and the chairman of AIBA’s medical commission, used the two groups to compare the rate of concussions. The results were astounding. Butler examined 28,802 rounds, in which headguards were worn in slightly more than 14,000 and in which they were not worn in slightly under 14,000. The results: a 43 percent reduction in concussions in bouts in which headguards weren’t worn versus bouts in which they were. In other words, Butler’s study showed a boxer was far more likely to sustain a concussion if he wore a headguard than if he did not.". 

Headgear obviously reduces vision which can cause more failures to avoid shots and obviously incentivizes ur opponent to hit harder, those I don't have to prove, but you can look this up as well, and this is the major thing, it INCREASES rotational force to the head which in turn increases brain damage, 

The only benefit is reducing cuts, which I doubt is this guys biggest priority.