IMO, Scihub and the ebook parts of AA should be considered differently and not conflated.

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.)

That's an excellent point. The problem cases with AA are edge cases on sci-hub.