It does nod in its direction, though. Or at least it used to. Mass production printing was high overhead, and publishers had reputations to protect. That wasn't perfect but they'd usually try to avoid the worst propaganda.

(Or at least shove it off onto an imprint with less of a reputation. Or into a category, like Self Help, where people know its shaky relationship to truth.)

It was far from perfect. But these days the publishing gatekeepers have largely lost the battle. People prefer the hot takes they get from tv and social media.