I certainly acknowledge that students are increasingly struggling to afford all aspects of post-secondary education. That includes textbooks. When students are put in a position where tuition fees are increasing at exponential rates every single year, they're certainly having to make difficult choices. But I think to pin any decline in income for content creators on students is a false characterization.
For one, students are spending significant sums on university textbooks, over $600 in average annual household family spending. Moreover, adequate funding for arts and for writers is not mutually exclusive from fair dealing. We certainly support that; just not on the backs of students. The other mechanisms I talked about, open educational resources and open access journals, are mechanisms for more dynamic exchanges of information among the educational community, but certainly not at the expense of content creators; rather, they're championed by many content creators within the academic community.