I'd rather have it disabled as well, the greetings sound like everyone is under the influence.
IIRC, they were not sure if they'd add during the development, and I do appreciate their effort in trying, but I dunno...It's one of those game features you need to have a massive resource investment and do it properly, otherwise it ain't worth it. And I mean it for a game with a limited pool of characters; Bannerlord has a plethora of characters. I'd rather invest it in non-generic texts dialogues. For instance, the greetings could at least vary according to culture, etc