To quote my freshmen year English professor, "Anything is hard if you do it well."
I went to a decent state school, but I averaged more than 40 hours a week on classes and class work. Most of my classes were computer science, math and physics. I wanted to do well in things that were hard, so it was hard.
But I do agree with your main point: it's not lack of intelligence that prevents people from getting through certain majors. It's mostly a lack of motivation and work ethic.
I went to a decent state school, but I averaged more than 40 hours a week on classes and class work. Most of my classes were computer science, math and physics. I wanted to do well in things that were hard, so it was hard.
But I do agree with your main point: it's not lack of intelligence that prevents people from getting through certain majors. It's mostly a lack of motivation and work ethic.