Earlier quoted context omitted.
Of course, but you are assuming that you already know the meaning of "kawaii". My point is that if you don't know the word, you can't infer the meaning from the Kanji, except in very simple cases. That's why memorizing Kanji alone really isn't as helpful. Knowing 90% of Kanji meaning and reading doesn't help you much in understanding compounds/words.
> but you are assuming that you already know the meaning of "kawaii". Have you ever been around non-native students of Japanese? This is the one word that is pretty much guaranteed to be known by all with an interest in anything remotely Japanese. Your point is valid, but kawaii is perhaps not the right example.
Most non-native students of Japanese will almost always encounter that word in hiragana, katakana, or even Romaji--encountering that as a kanji is actually remarkably rare.
The fact that the kanji for kawaii is an ateji makes it one of those odd ducks.