I don’t want to be argumentative here, but,

- “Need to” is a very different criterion from “is useful”, and “visually split” is, well, kind of unexpected to me!

- The comparison to native Japanese speakers seems especially irrelevant here,

- You’re not using your native orthography here, you’re using romaji, I don’t think it’s anyone’s native orthography.

- You probably want to use the Romaji heavily anyway, because that’s how most people will use computers.

When you’re learning a language you naturally multiple approaches to understanding a single topic. You’ll see a word written, you’ll hear it. You’ll hear a sentence and then someone will give you an explanation of the grammar, and you’ll compare that with your notes. It’s multimodal and all of these different modes are useful.

Like how romaji is useful for understanding conjugations. Obviously not necessary, just useful.