Yes, but did the fighter kill /10/ giants?

IDK, what are you implying? That classes have different roles in combat, and contribute in different ways? That, in combat, no class can be seamlessly replaced with just a warm body with a background, but, as it were, no class?
Because, out of combat, it seems like contributions often come one at a time from a specialist in a task, spell or ritual that just solves the problem, or a "pillar specialist" like the 'Party Face.'
Like it stops being so much a team sport.