Why didn't we already know?

Why did it come as a surprise to politicians and health advisers that so many disbelieved everything about Covid-19 and the vaccines and restrictions and isolation and telling contact tracers the truth? 

Where were the sociologists and psychologists and historians? Did even one of them say something like 'don't forget that a large percent of the population will jack up about your policies'?

I think we always totally underestimate the irrationality of humans. Stuart Sutherland (Sussex Uni prof Psych) wrote a 380 page book called 'Irrationality: the enemy within' with 380 pages packed with a history of human stupidity. Why did anyone think otherwise?

There are also a number of little known facts that systematically prevent individuals from giving the facts (truth) to contact tracers (or anyone). In 1948 Alfred Kinsey published research that found that nearly half the population has an affair at some stage. If it is still the case then they won't want to share where they have been with a contact tracers. It is estimated that 10% of children don't have the father they think they have. During the AIDS epidemic a hospital in Australia trialed a scheme to use pre-collected parental blood for their own child but had to abandon the scheme after just 4 cases because of a difficulty explaining a child's anomalous blood group.

And what about those who are up to no good? Just not telling is Australia's version of the fifth.