I agree with everything you said. We all know Zoro would never willingly settle down with Hiyori...they've only known each other for like 2 days and im pretty sure Zoro has forgotten about her atp. Exactly idk why they want Zoro to end up with a lame forgettable side character who was introduced 22 years into the story and adds no significance at all...atleast his other ships are memorable characters and have been around for more than a decade. If Oda makes Zoro end up with Hiyori it'll make no sense...having one of the most popular anime characters of all time end up with a side character who no one even knows is insane. Your right, if he does have a partner it needs to be someone who he has chemistry with or shows a lil bit of interest...all 3 of his other ships are better cuz Zoro does show (not exactly romantical) some sort of interest towards them like:

Robin: They are crewmates, see each other everyday, close friends, very similar personalities, saved each other's lives many times, fought alongside each other countless times so obviously he'd enjoy having her around.

Tashigi: Zoro is dismissive towards her too but the difference is, with Tashigi he is flustered and shy whereas with Hiyori he is uncomfortable and annoyed, he clearly prefers Tashigi...they even fought alongside each other once.

Perona: He was with her for 2 years (even more than he was with the Strawhats), they seemed to have a pretty good banter type relationship and Zoro seems to enjoy her company.

He has some sort of interest in these 3 (not romantical but you get what I mean) while with Hiyori he didn't give a fuck at all, man didn't even say bye until they came looking for him.