I would prefer a robotic, unrealistic voice so I don’t start subconsciously thinking I’m hearing a real human speak.

You can tell it to talk in a robotic, unrealistic way and it will do so.

Here is a demo from their presentation: https://youtu.be/D9byh4MAsUQ

I have the opposite impression from that demo.

It doesn't sound like a neutral, boring voice. It sounds like an overly dramatic person pretending to be a robot.

>It sounds like an overly dramatic person pretending to be a robot

That's precisely what it was ordered to do.