Right, and part of the problem with an "ah, who can know the truth" approach is that it absolutely will be weaponized by bad faith actors. It's really easy to be loud and persistent with a lie if no one calls it out because "who knows, really".

A parallel to this is something I saw in Italy where a number of people complain that "all the politicians are corrupt". This provides cover for the really rotten politicians, because it puts the ones shoveling money to their cronies in the same category as the basically honest guy who's trying his best to actually do something positive for his constituents.