This is because this is how you've trained your brain to process Japanese.

Korean includes white space for this reason, and since everyone gets used to reading it with no Hanja, they don't find it awkward.

So, it's perfectly possible to ditch Kanji and add spaces and have a way more accessible language.

That doesn't solve the homophone issue though.

usually a parenthesis with corresponding character is used to be explicit or to avoid confusion but its strictly for chinese loan words like:

ex) 시간 (時間)

compared to furigana (note that its not even possible to display the phonetic hiragana): 第二巻

younger generation are no longer learning Chinese so more English/European loan words are directly used which ironically fixes the issue.

it is impossible to converse in Korean without using English/European loan words

ex) 아이러니 (irony)

This allows new ideas/concepts to quickly disseminate in the collective Korean psyche. Constantly new words are being invented, slangs used by primary/middle school are unknowable.

Abbreviation/concat combos to create totally new words:

ex) 씹상타치 (way **ing above average) also written as ㅆㅅㅌㅊ (wfaa) literally means

If you look at old Japanese video games before the hardware could do Kanji, they used spaces to separate words. But when the game was capable of Kanji, the spaces went away.