Reading Home Deus: A Brief History of Tomorrow by Yuval Noah Harari recently. Harari postulated that knowledge which does not change behavior is useless. But knowledge that changes behavior quickly loses its relevance. The more data we have and the better we understand history, the faster history alters its course, and the faster our knowledge becomes outdated.
Which leads to the need for the pursuit of truth, or the approach to the truth. If we change our behavior according to false information the outcome can be detrimental. At the same time, perhaps letting some people follow the false information is a way to approach the truth by weeding out the false information.