you're just closed minded. We don't understand anything about the universe. It takes wisdom to know that...but then there's people like you who think they know everything.
But we do know that our computers are not advanced enough to create a "true" AI like that of which you speak. At least, not yet, and certainly not a computer that you'll find in homes anytime soon.
Fun Fact: The human brain has been calculated to consume about 2.5 petabytes of data. That would be 2,621,440 gigabytes.
Now, multiply that by the number of intelligent(i.e. sentinent) NPCs in the game.
By the time that would be feasible for a home computer to run, we won't even be dust in our coffins anymore.