I disagree. Fluid natural conversational AI is far more productive than any other interface for working with LLMs. Although I suppose you could make the argument that it should be more... Robotic like. Like in StarTrek. Which, is honestly probably better for work, too. A "get shit done" mode, of pure, cold, efficiency.

Ironically, Data (from TNG) has a lot of heart to him

In one of the videos the AI quips back things like "Happens to the best of us" - its basically pretending to be human and that feels kind of creepy and weird, like it's trying to cultivate a para-social emotional bond.

I just want voice assistants to reliably understand what I say and do what I mean

So hopefully you can turn that off.

There are plenty of applications for that more human conversational style though (from mock interviews, improv practice, learning languages, etc) - I just don't want that for most things.