My theory is that due to the way they are bent they don't have the strongest structure and might be prone to fractures thus unusable in a fight, am I wrong?
Chicks dig them.
Like other ostentatious displays of power to spare, the fact this guy can tote these things around mean he is super fit, finding food, not getting eaten by predators, free of parasites, and ready to sire all the young for the next generation. The females of this species like a male with huge fancy horns and so such horns are selected for despite the fact that they are really heavy and get in his way.
The curly claws are products of this same female preference selective pressure.
Domesticated geldings do not develop the horns or claws and do better without them. Except as regards mating which was taken off the table earlier in their lives.