So the defense for removing features of the game is "it's an abstraction"? What if I removed death? Hitpoints, after all, are merely an ABSTRACTION (!!1!!11!1!) of health. You don't REALLY die when you lose all your hitpoints...nor do you really lose unconsciousness in 4e, but that's another discussion altogether.
Well I'm sure there are some genres or playstyles where not being able to die in combat would be apropriate. That has nothing to do with abstraction though, and is irrelevent to what we are discussing.
Parrying/locking weapons: doesn't happen, since you don't get better at avoiding blows when you get better at fighting. (At least, in 3e. Not sure how 4e works. Not that characters actually deserve such a bonus in 4e, as apparently wizards are just as skilled at swinging a sword as fighters are.)
Actually in every edition you got better at surviving attacks as you gained level. 4e is the only edition where you actually got harder to hit as you became a better fighter, which you'd know if you only knew the rules to the game that your spending so much time complaining about. You'd also know that wizards are not in fact as good at sword swinging as fighters by any remote stretch.
Cutting off hand/stabbing through eye: disarming is a far more likely (not to mention realistic) technique. Also, called shots don't really work. Disarming does.
So wait, why exactly do called shots not work, while disarming does? They are both things a normal person can do in the course of a fight. And I suspect far more people have tried to stab somebody in the eye in a fight then disarm their foe.
Hamstringing: this came late in 3.5, with some of the rogue feats that let you sacrifice sneak attack damage for other effects.
So in 3e only rogues could hamstring, and only if they took the power that let them do so. Your kind of proving my point here.