The strawman of the existence of factually incorrect content is irrelevant in my view. Everyone loves to jump on conspiracy theories or whatever other stuff is out there as proof that people (other people) are too dumb to be exposed to the world. First, I think the relevance and the number of serious adherents in the extreme version of these conspiracies etc are dramatically overstated because they reinforce a narrative. Second, I think most of it is an effect, not a cause, of people being told what to do and what to think. People uncomfortable with narratives that end in them giving something up will take shelter in alternative explanations. The problem is not the nutty theories being available, it's in the way that one group forces itself on another in the first place.
All this to say, we can be adults and let everyone get the same information and make their own choice, or we can go the other way where someone who thinks they know more than us (and you hope it's you but it doesn't have to be) gets to decide. Frankly, the latter idea is ridiculous to me.