Until you try to use them. IMO bladed weapons harm the immersion when the character body model doesn't allow to be cut and stabbed. It's bad enough with explosive weaponry but I can play with that.
This is an issue with the depiction of violence in general in this game.
Ironically, beating someone to death through extremely cut/stab resistant armor with a blade, or concussing them to death with an explosion, might be the most plausible of effects depicted within current constraints. Shockwaves and bludgeoning impacts can kill people through armor/obstructions...more focused attacks usually need to past through vitals or cause serious blood loss to kill.