I think humanities majors are underrated. What use is a science-centric major when any *real* work in that specific subject is masters or PhD level? Unless someone is actually interested in that specific subject.
But humanities majors, while the degree themselves tend to be limiting/over saturated, since your major for med school admissions doesn't matter, they give you more of a rounded experience. I'm doing a B.S. in Psychology, which on its own isn't unique at all. And a bachelor's in psychology is practically useless. But it's an interesting subject, and the pre-med reqs pretty much cover all of my degree's normal science requirements, so all that is left are the psych classes I'm interested in. And since in any field you enter you'll interact with people, the subject of Psychology is rather useful.
As for the difficulty, the fact it is an easier major matters not. That is what the MCAT and pre-reqs are for. Why should I major in astrophysics and take mind-boggling difficult physics classes when a good MCAT, and solid grades in Bio, Chem, O-Chem, and Physics already shows my ability to take on harder (relatively) material?
Plus a major I'm more interested in gives me better talking points in an interview, and I can easily hype up Psychology much more than a chem or bio major in my case.