What makes you say that? Why is taking damage- on top of being ranged out of your desired abilities via enemy movement and abilities- a necessary condition of being kited? A think if a sniper leg shots you, attacks someone else until you're in range, then rolls away, keeps attacking someone else, then flashes you when you're about to be in range, then runs 35 m away from you and attacks someone else, then leg shots again when flash ends... you're being kited, even though you took minimal damage.
I'm assuming that the origin of the term "kiting" in MMOs came from the analogy of pulling a kite behind you. Why do you have to be shooting the kite for the term to still be applicable lol. But anyway, this is a useless debate over terminology. The point is that focus's damage output is not as hampered by anti-melee-esque abilities as vig's is. Vig doesn't have a QOL problem with being kited, no one's saying that- it just doesn't have the advantage that focus does in that regard. Minimal/no effort is required to ensure that your damage lands. Vig requires a little bit of effort. I'm just answering the OP's question. He will get less frustrated with his master strike's being interrupted and being out of range for overhead slash and plasma brand if he plays focus spec instead.