I don't actually disagree that you should learn kana early. I just didn't want it to "block" the article because I genuinely believe learning kana can be done in parallel with understanding verb conjugation. There is no hard dependency between them at all. I particularly like that it unlocks the visualization of swapping in the vowel which kana obscures. And I like that the article is understandable to a reader with zero knowledge. That motivates the choice.