Who has time to peruse dozens of papers of technical jargon on COVID? Who's got the time to read a book by Chomsky, compare and contrast with a conservative writer on the same topic, a historian, while looking at the experts' interpretation of these things?
Out best understanding of things is just as fragmented as the wild conspiracy theories, with the difference that the experts debate minutiae that requires deep knowledge and patience.
We cannot deeply research more than a couple of things at a time, at best. We crave easy answers and grand narratives.
Next best guess: the conventional truth is inconvenient.