Here’s a way to test whether a subject is easy or not:
Enroll in a 300-level (i.e. 3rd year) course, without taking the prerequisite 100-level (1st year) course. If you can do that, then the subject is easy.
I did it all the time when I got my liberal arts degree. It was impossible when I got my engineering degree.
Actually, most history courses don’t even have any requirements for previous study.
The 3rd year courses just require longer, better-researched papers.
This is easier to do if you are experienced and have taken other lots of other liberal arts courses. But it is quite possible for a totally inexperienced person to get a grade of “B” by simply writing a dull summary of the assigned reading. The experienced liberal arts student will earn an “A” by adding his own insights, and he will feel smug and superior to those dumb engineering majors who unwilling enrolled in the course because of a bureaucratic requirement.
But both of them will get passing grades.
Reversing the situation, in a 3rd year engineering course, the liberal arts student will fail.