What do you mean? In some of those cases (Ozone, HIV, covid), people did a lot of work to deal with the problem, and succeeded. Are you saying the alarm was not

What do you mean? In some of those cases (Ozone, HIV, covid), people did a lot of work to deal with the problem, and succeeded. Are you saying the alarm was not warranted? We should have continued using CFCs? not worked on ARVs? Ignored the problem and not worked on vaccines? What exactly is your point? Because the sky didn't fall, we should not have cared a priori?