In other words:
> For some people it doesn't matter what method you use
This is a theory cop-out. If people figured out how to read and write well without phonics, that's worth investigating too. And it's unlikely that they also succeeded just because they were geniuses or had some secret unknowable method.
Also, replying to someone asking a genuine question with totally different question is bad manners, and I'm going ask that not be done here.
The article makes the explicit point that significant percentages of children can learn to read despite being sabotaged by a bad learning system. (In part because some students figured out how to spell words out phonetically in their own.)
The formal phonics system might be recent, but the phonetic nature of our writing system is ancient.