D. Burgess I was doing that sort of thing before I had responsabilities (family)
He may have not "invented" the tech. but he did refine a draw to a much more efficient stroke, just the same as many other sports were someone tweaked a move and made it better.
And good technique = (

Sorry Dirk) saving your butt on a trip, lake or river. And reaching to improve ones ability is a good thing.
Any boat full of gear responds differently than an empty one and requires you to vary your tech. to acheive the same goals.
This is where the practice part of different scenarios comes into play, either with "gates" or imagined hazzards. (ww is easy, easy rapids first; large bodies of open water with controled teaching conditions is another)
And the real question is whether you and your group has the tech. (skill) to do a certain trip.
When I taught a lot before my kids came along and got involved in thier activities was " Why should I learn that (stroke or rescue) I am only going to do lakes?
For those of us that have been around awhile know the answer and just don't want to see another news story.
So having a large bag of different strokes is a bonus,
and who knows someone may be tweaking a move that will bear thier name.
Forward, backwards, sideways it is not about who taught you but whether you have the ability to control your boat in the conditions you put yourself, because you have to get yourself out of it, and everyone will meet a "surpise" on a trip.
Jeff