I have mixed feelings about this.
Part of me wants to say "yes. Every OW instructor should have to be certified tech diver, even if it's only at the lowest level."
But then I think about my high school Algebra teacher. I think he was a really, really good Algebra teacher. I believe he consistently turned out a bunch of sophomores every year, a very high percentage of whom were actually competent at Algebra.
His college degree was in Social Studies. He did not know a lick of Mathematics beyond the high school Algebra that he was teaching.
I also think of several Motorcycle Safety Foundation instructors I have known over the years. They teach the basics to people who don't know how to ride at all so that they can get their first motorcycle operator's license. I roadraced for many years and was also an instructor for the California Superbike School (a school that started in CA but now operates schools all over the world and is certainly one of the top, if not THE top, advanced motorcycle riding schools in the world). I can safely say some of those MSF instructors had zero riding skills that I would label as "advanced". Yet they were able to consistently turn out new motorcycle riders who lacked for nothing except real-world experience before being ready to go on to advanced levels of riding.
In the end, I am forced to conclude that being a good teacher of something does not actually require any skill or knowledge beyond the actual subject being taught. What it does require is skill at teaching, which is a whole different matter, and mastery of the specific material being taught.
In my opinion, of course.