The mainstream presses never had a reckoning for their role in issuing false rationales for the war in Iraq. Those who believed the propaganda shouted down dissent as "conspiracy nuttery" and anti-Americanism. After the fact, many of those I know simply switched their positions. They denied they ever unfairly dismissed concerns or experts (Hans Blix) which ran counter to prevailing propaganda.
Which brings us back to the present rationales for expanded state power, where dissent is dismissed as conspiracy nuttery and anti-science. Once again, the incentives are ignored.