That sounds a lot more like confirmation bias than any real effect on the AI's output.
Gung-ho AI advocates overlook problems and seem to focus more on the potential they see for the future, giving everything a nice rose tint.
Pessimists will focus on the problems they encounter and likely not put in as much effort to get the results they want, so they likely see worse results than they might have otherwise achieved and worse than what the optimist saw.
That's a valid sounding argument. However many people with no strong view either way are producing functional, good code with AI daily, and the original context of this thread is about someone who has never been able to produce anything committable. Many, many real world experiences show something excellent and ready to go from a simple one shot.