Pirates hold up to their name they just live in bad conditions, ninjas aren't what everyone thinks they are. Whenever there is an argument people always talk about the pirate's diseases and the ninja's powers when in reality ninjas don't have powers. They cannot run up walls, disappear, or shoot stuff out of there hands. Plus if your talking about current times, pirates wouldn't have disease because of modern medicines. And honestly the whole arguments pointless guns>swords
For lazy people the summary is in bold.