A. Politicians have interests representing themselves as well as their country, and thus have given dishonest advice (masks don't help) with an ulterior motive (save them for hospital), downplayed the problem, and covered up the number of cases.
B. I think a lot of actually qualified experts (doctors, scientists) to think the public can't handle the truth perhaps? I still have yet to see anybody in any position of respect or authority simply say the bald truth: "A few million Americans will die, at least, unless some radical cure happens. Social distancing is a drop in the bucket, ventilators make a tiny difference. The vast majority of young people will be totally fine"
I'm disappointed in our society for failing to bubble up and synthesize good information quickly.