Great way to frame it. But it does rely on just chance that the nouns you’re talking about will slot into different categories. Would be much more useful if pronouns let us refer to ‘the previously mentioned subject’ or ‘the previously mentioned object’ rather than ‘the previously mentioned masculine person’.

Like in “John met David. He was delighted to meet him.” We have a conflict over the ‘masculine object’ register, so ‘he’ and ‘him’ are ambiguous.

But if we had a pronoun like ‘de/dim’ for ‘previous subject’ and ‘ne/nim’ for ‘previous object’ you could unabiguously say “John met David. De was delighted to make nis acquaintance, but ne wasn’t so keen”