If one of the most influential books in UX is "don't make me think".. you don't have to wonder that you get user that do not think.
I think enough during my workday. And when explaining things to my daughter or reading a book.
You probably never read the book, because the author never tells you to "dumb things down" but to make them so intuitive you don't have to think about them.
Same way you don't have to think how to open a tab or a door.
Have you ever been in front of a door and wondered if you had to push, pull, approach, slide? That's bad design.