In particular, Scihub is in opposition to the parasitic international publishers who dominate and control scientific publishing for profit, mostly on the backs of science generated by academia and other not-in-it-for-the-profit folks.
In contrast, downloading ebooks may, in some cases, lead to individual authors being hit in the pocket, in a profession it’s already hard to make a living from.
(I wish we’d figured out a better way to organise book publishing without publishing companies getting in the way and taking their large slice, allowing authors to profit more directly.)
