I, for one, have never suggested that the northwoods stroke is an all purpose stroke useful at all times in all circumstances. When appropriate (and sometimes even when not) I draw, sweep, pry, backpaddle, scull, simply improvise, and even still use the J-stroke. For me paddling is not a religion, and I am always suspicious of mystiques. Being far from an expert paddler, I expect that I often choose a less-than-ideal stroke, and I know that my execution is regularly far from perfect. But I generally get where I want to go.
I learned the northwoods stroke because I had heard that is could be efficient and effective (as I have found it can be), and that though the stroke has a long history, it seems to have fallen into general disuse. Sometimes I enjoy the challenge of learning something new for its own sake; sometime I like learning how to do things the old way (I have hand planes as well as a router and cordless drills as well as braces and bits) and I do like exercising new skills (even if inexpertly) that I may pick up along the way.
Most of my paddling is on flatwater, so I often have occasion to use the northwoods stroke, which I use when paddling tandem, not just solo, and use (but not always) in choppy water when paddling into the wind. I have no problem with those who do not use the stroke and who have no interest in learning it. As they say, different strokes for different folks.