Having worked front line tech support, I have to disagree. People are inherently dumb, and choose to stay that way in many cases.
This is called optimisation and is in most cases okay. I choose to be dumb about cars. I ask specialists dumb questions and expect them to give me useful answers. Computers are similarly ancillary to many people’s core value added.
I mean I've worked with literal rocket scientists that can't figure out how to attach a PDF to an email. I would have a hard time describing them as 'dumb'. And don't even get me started on trying to help doctors and surgeons when I worked in medical.
Just because we might find something easy or 'intuitive' after spending most of our lives in front of computer doesn't mean it's actually easy.