[defertoreptar]

What you're referring to as "gatekeepers," I would see as one of many sources of evidence. Others include direct experience, non-expert opinion, data from experiments/studies, and so on. Ideally we'd weigh each source of evidence by how trustworthy and reliable they are, and then we'd use our brain to make sense of what may be true based on that evidence.

Society does not "work better when gatekeepers decide what the truth is." That's especially the case when the "truth" is political, and people have ideological incentives to report what they see as the truth in a certain light. Instead, society works better when individuals are free to look at the evidence and think about it for themselves. This is because in this case, you're treating the members of that society with human dignity.