Bare knuckle fighter from way back when didn't suffer the same injuries that fighter have today and the fought more rounds, that was only because the peace was so slow and fighter did punch in power combination as the do now . The boxing glove change the peace of the boxing game and allowed fighter to punch full force with out the fear of breaking there hands .
not if you make your knuckes hella strong it wont, im telling you the truth, brake your knuckles enough times and there like brass knuckles
im not sure of anyway of making your hand stronger , fighter's after there careers are over develop arthritis or other hand problems ... the price you pay for being a fighter .