Coupling the whole robotics and AI thing. In Asimovs stories they first built the robots, which get smarter and smarter, but this is not how reality worked. Robots are rather specialized and most AI/automation we have today is about data, which is virtual.
They're all like, lets build a robot, then make it intelligent, but it should also move like a human, oh and why not replace their internals with life-like organs?
It's like they make a run through all science and engineering in about 30 years of development and pretend it's mostly the work of one master mind, which is ridicioulus. The whole "technical" side of Westworld is trash.
It's more a philosophical story than technical or psychological, with a few deus ex machina to get the ball rolling.