If you have a long standing, effective heuristic that “people with excellent, professional writing are more accurate and reliable than people with sloppy spelling and punctuation” then the appearance of a semi-infinite group of ‘people’ writing well presented, convincingly worded articles which nonetheless are riddled with misinformation, hidden logical flaws, and inconsistencies, you’re gonna end up trusting everyone a lot less.
It’s like if someone started bricking up tunnel entrances and painting ultra realistic versions of the classic Road Runner tunnel painting on them, all over the place. You’d have to stop and poke every underpass with a stick just to be sure.