[InclinedPlane]

It's worse than that. YouTube tries to maximize engagement, so it will preferentially recommend videos watched by highly engaged viewers. Guess what category of viewers are highly engaged? Indeed, conspiracists, polemecists, etc. Imagine walking into a college campus and asking the registrar for some recommendations on classes to take and them telling you to go listen to the crazy religious nut shouting from atop a milk crate, because they were so much more engaged with their material than anyone else on campus.