I agree with this in principle ...
But for those of us with a deep seated aversion to high kicking, why can't I use my hands to 'mix it up' and go high/mid torso with feint, strike, setup move, or finishing move?
In other words, I agree with the principle that we must mix up the different zones. In fact, the techniqes I've chosen to teach almost always use a high, low, and medium piece (in various order). But we have four striking weapons, not just two. So speaking for myself, I am confident I can occupy him head high/upper torso with all manner of hand techniques while plotting/executing low kicks--and vice versa.
Now, this doesn't mean I prescribe this for everyone (just my students

). Hapkido was my first art, and I've seen guys who were as good as I imagine zDom to be (Drag'n, sorry I don't know your background as well as zDom's; for all I know you may be just as good). They could put a kick to the head on you as fast as many
good boxers can throw a left hook. But in hindsight, I think that either they were just very gifted, or exactly the right age and experience level combined to give them superb skills--for a time. But those skills may erode over the decades, while low kicks should not--have not for me, anyway, and I'm 55.