[smallnamespace]

> I don't think anyone today would seriously argue that Hanja is preferable

It's necessary to use Hanja today in educated contexts because Hangul has too many homophones, and most educated (technical, literary, scientific) vocabulary has a Sinitic origin and therefore are more homophonic than typical Korean words.

[int_19h]

Sure, and lawyers in English-speaking countries similarly use Latin and Old French jargon to reduce ambiguity. But this is a fairly narrow use case that is really more of a specialized notation - it's not used day-to-day even by people who regularly use Hanja professionally.