Conflicts ! ~ try - avoid fights !!

Are fights necessary and do people fight right battles or fight unnecessarily !  Some types of Deers have antlers – but have seen them fight more with fellow deers rather than use the same antlers as weapons when chased or killed by its predators !!  People fighting using arms – be it sickles, swords or pistols is understandable but why would someone use a lighter one – Antler of a Deer ! – is that really a weapon !