Many of these advantages (e.g. aligned recommenders pushing people towards longtermism, or animal rights) seem more like aligning recommenders with our values than any neutral account of alignment. It seems than any ideology could similarly claim that aligned recommenders are important for introducing people to libertarianism/socialism/conservatism/feminism etc. In contrast, this probably isn’t the best interests of the viewer—e.g. your average omnivore probably doesn’t want to be recommended videos about animal suffering.
Many of these advantages (e.g. aligned recommenders pushing people towards longtermism, or animal rights) seem more like aligning recommenders with our values than any neutral account of alignment. It seems than any ideology could similarly claim that aligned recommenders are important for introducing people to libertarianism/socialism/conservatism/feminism etc. In contrast, this probably isn’t the best interests of the viewer—e.g. your average omnivore probably doesn’t want to be recommended videos about animal suffering.