[MA] Targeted Attack and Hit Location

[Exxar]

Targeted Attacks states that if you use a specific version more than two times in a fight against the same opponent, he gets +1 to all of his defense rolls vs. that TA.

Why don't ordinary attacks targeting hit locations other than the torso suffer the same penalty?

Let's say we have two warriors; warrior A and warrior B. A has TA (Broadsword/swing/neck), while B hasn't. Using a broadsword, they both attempt a swinging attack at their foes' necks several times in a fight. Does A have distinct, noticeable moves which grant that +1 to defenses while B doesn't, just because he isn't trained but tries the same thing over and over nevertheless?