You see, IQ is on a bell curve and 100 is the median. That means half of people must have an IQ below 100. At some number, the exact number is debatable, higher reasoning ability diminishes.
The second factor is education/knowledge. Having none, partial, or incorrect information can lead even rational people down the wrong path.
If you combine these, you get what you are observing.
I'll leave you a quote from Deming... "Every system is perfectly designed to get the results that it does." I say this because we need to change something if we want a different result.
"Remember, I'm pullin for ya. We're all in this together."
Red Green
She doesn't even know that I'm a guardian for her