> A system fails when its natives don't know how to use it.
They definitely do, it's just that hand writing has become a more niche use case in modern society (regardless of the language).
If you removed all kanji in a block of Japanese text (replaced with kana), I'd expect at least a 50% reduction in reading speed for natives, and some errors in comprehension. They're fundamental to the language.
You wouldn't expect the same 50% reduction if the natives had been educated under that paradigm and suitable adjustments made to the system like adding spaces etc to accommodate it.
They definitely do, it's just that hand writing has become a more niche use case in modern society (regardless of the language).
If you removed all kanji in a block of Japanese text (replaced with kana), I'd expect at least a 50% reduction in reading speed for natives, and some errors in comprehension. They're fundamental to the language.