Right, my counter to that is that's great if you want to leisurely learn Japanese, but also not very relevant for the type of course this book supports. These typically start you on kanji pretty much in week 3, in conjunction with the word lists that support the kanji you're learning every week (and constantly use throughout that week and subsequent ones), specifically because of the argument raised: learning kanji without the words they're in, and even if that, without using those words, is ridiculous.
The argument above applies specifically to university courses, and was made by someone who is familiar with teaching such courses. So I don't think you can just discount it with handwaving, especially as there are claims about better success rates.
I'm not discounting anything, but different people want, or need, different courses.
My book is geared specifically towards people who are to enthusiastically committed to learning Japanese, and want more information about the language they're paying money for to learn, with some assumptions about what that means: they, like me, and like many of my fellow students at the time, but not like everyone, want to learn Japanese properly, without hand holding because some grammar or some orthography is deemed too hard. We'll see whether that's the case as we learn, not as an assumption baked into the course.
Of course that method doesn't work for everyone, but for me, and for many others, but again not for everyone, getting kanji early was exciting, motivating, and awesome. I would have been angry at a promise of a better approach without kanji for half a year as a paying student.
So that's the book you get here, too: I am not making assumptions on how slowly you want material, this is a grammar for supplementing your course work, or deep diving if that's what you want to do. And if the Japanese used in the book is too much, too soon: it's a free book, find one you feel fits you better. But we're better off with a spectrum of works: rather than every book following the best methodology, we need all those methodologies, and then people who go hard, fast, can pick the hard, fast books, and people who don't can pick the slower, "better success rate" approaches and do well with those instead.
