I can confirm this. I passed N1 without learning to write. I later learned how to write all of the kanji, and all it does it help you distinguish very similar kanji without context. I tried learning all the compound words (i.e. which kanji to use for every word) but gave up a few thousand Anki cards in. It was time consuming and impractical. (Wanted to pass Kanken 2) Props for anyone who put in the work though.
Don't drill words drill sentences (no Japanese word means an English word, and no English word means a Japanese word.) And don't fall in love with any of the sentences, move on to new sentences. Eventually the knowledge accumulates, but only through volume and variety.
