I want the setting I am designing not to have AI capable of really doing much in terms of what I might call "human factors."

What do I mean by that? Essentially by "an AI capable of 'human factors,'" I mean an AI that could analyse or predict the way humans behave or respond to stimuli or interpret the subtler points of human art, philosophy, and language. Bear in mind that this includes many things we have today, such as algorithms that can target adverts or write short stories with consistent tone.

The simple explanation for why these AI and algorithms do not exist is that computers are just not as good; The problem is that this setting also has nuclear fusion and genetic engineering good enough to create wholly new body plans, among many other advanced biotechnologies and physics technologies. Even assuming all those technologies are actually possible, they all require very good computing power; Nuclear fusion would require extremely good simulations of plasma physics, and that level of biotechnology would require the ability to model the folding of proteins with extreme accuracy and speed.

And so we come to my question: How is it that humans might be able to produce simulations of physical and chemical systems far beyond what we are capable of now but be behind us in terms of the ability of algorithms to predict and interpret human behaviour?

The common answer would be that AI capable of "human factors" is considered unholy and is forbidden by the dominant religious groups, but, whilst I will go with this if there are no other worthwhile options, I would like to avoid this explanation if possible.

Secular ideological reasons are fine, but only if an explanation is provided for either:

A) Why every geopolitical superpower in the Solar System seems to share this ideological tenet,

OR

B) Why it is that those factions that allow "human factors" AI do not have an overwhelming advantage over those that do not.