Human minds are incredibly capable and flexible, and acting that the current state of practice of the STEM field and IQ is some sort of limiting factor in human capability seems, well, incredibly unimaginative. The standards of education changes over time. If you go back through the decades, the mix of "average" skills is different and arguably lesser in many ways. In other ways though, today we have a wealth of formal analytical thinking, but suffer a poverty of philosophical and creative exploration.

Perhaps the thing that AI may unleash is the power to access STEM techniques, without the same kind of need for formally thinking or operating in them so closely.