The disconnect with real knife-fighting ultimately comes down to artistic liberties. That sounds like a major cop-out because it is a major cop-out.
A key factor in this is also that mortal combat (snrrrrrk) in fiction tends to favor drama. You can't have drama sufficient to entertain most audiences in a five-to-ten second fight, which is what most conflicts come down to. Someone comes at you with a knife? If they get a good thrust in, you're probably dead. If you get a good thrust in, they're probably dead. If both combatants come to find themselves disarmed, the fight devolves into a brawl... but at that point, the fight is no longer about knife-fighting.
Fiction takes extreme liberties. Video games just as much so, if not more.
A key factor in this is also that mortal combat (snrrrrrk) in fiction tends to favor drama. You can't have drama sufficient to entertain most audiences in a five-to-ten second fight, which is what most conflicts come down to. Someone comes at you with a knife? If they get a good thrust in, you're probably dead. If you get a good thrust in, they're probably dead. If both combatants come to find themselves disarmed, the fight devolves into a brawl... but at that point, the fight is no longer about knife-fighting.
Fiction takes extreme liberties. Video games just as much so, if not more.