Why?
What if you kind of hear me and are pretty sure I said 'positive' but not 100% sure? What if you're 50% sure? What two people are listening and one heard me say 'positive' and one heard 'negative'?
It's hard to imagine a physical process being dependant on something external and near impossible to quantify or measure.
The conversation simply represents the idea that the causal cone of the observed system is now interacting with the particles of the observer, making them entangled and so ‘collapsing’ the wave function or whatever you want to calm it.
Information is physical, although I agree that the conversation isn't the important part, it's just a useful metaphor.