Well, yes, just the prefixes killed AI, not the developer laziness or their focus on other things.
I remind you that one of the smartest AIs in history was the Metal Gear Solid console series. It's funny that Phantom Pain AI is just awesome compared to the previous sections, and that part (from the license) has come out on the PC.
In my opinion, you do not understand exactly how the industry works, why it has a look that it is now and how it has come about. And I do not want to understand deeply at all. You like a simple answer: "ALL WOMEN ARE PARLAMENTED !!!". It's like a grandmother who retires at 3,000 a month screaming "OBEMA GUILTY !!! 1111"