It's probably a question of awareness. How many of these people are reading e.g arxiv preprints to see this kind of research in the first place? There's also a rebound/face saving effect: if the CDC, State Health Officials, etc. got it wrong at first why should we believe them about anything? I just really doubt there are secret totalitarian Mayors and Governors out there intentionally locking people in their homes despite all evidence. Given politicians obsession with reelection and the unpopularity of these lockdowns it doesn't make sense they would do it for no reason and basically guarantee they lose their next election.