The Crusades were nothing more than a series of massacres for a land grab and the Crusaders failed the minute they encountered armies who could actually fight back. Knight Wank is fascinating because it’s almost entirely based on fictional portrayals where the Europeans in tin cans won all the time against evil monsters and savages.
Even if you wanted to larp, the Templars already looked fairly interesting and cool. Why would you want to rep a fantasy souls game boss?