Well to put it simply if ninjas and pirates were to have a fight, ninjas would win with the stealthy killing abilities. But really would you rather be a pirate. Way more fun, the pilaging and raping that occurs has to be so much better then the hard core training and discipline that being a ninja requires. So if this argument ever occurs which it will, side for ninjas to win but with the notation of pirates being way cooler.
Unicorns don’t exist!