Also, Khatz has a notoriously kanji-heavy writing style. I think it’s fine because it’s exactly that: a style. With English we don’t get that kind of choice, so I think our initial reaction is to think it’s a little strange, but I don’t think it is—-uncommon sure, but not strange.

申し訳ない

1.5)NO ONE uses the kanji for this & that, except maybe kagrra,
(but that’s b/c that band uses heian poetry as a baseline)
　
2)furigana don’t extend their bounds!
if you wrote “来ないで” 　you don’t write こないで　 but just こ　
b/c the ないで is already on the page

3) since when is “pedantic” beginner vocabulary? 全く、お前

私、己の漫画を書き描いてるしそんなこと知ってるのよ。

ほら！事と書かなかったぜ！普通な者達、あの漢字をあんまり使んないぞ。

本当に、この漫画を直しなさい。

I guess maybe it comes from learning your first several hundred sentences from dictionary examples, which use archaic kanji much more commonly (at least for the entry words) than typical running text does?