"Rock climbing technique is the basis of all climbing technique." A friend with 50 yrs of climbing experience said that, and he's mostly right. WI 4 and steeper has alot to do with balance, body position, movement, energy conservation and strategic skills exactly like those in rock climbing. Swinging the tool and picking your line and protection points require specific knowledge, but the rest translates. Low angle ice is a different thing, more like mountaineering. Truth is, if you had good French technique, strong ankles and enough nerve, you could climb most of that stuff with a single tool and 10 point crampons. Thankfully, the equipment has advanced enough that we can be slobs on that account.