I don't believe that scientists are either paranoid or lackadaisical. It is quite proper for them to look at the limited evidence and draw different conclusions. As more evidence becomes available, from analysis of the circumstances in which people actually get infected, they will learn.
On the one hand it is good that the public see that the science is not static or monolithic and can be discussed openly. On the other it gives an opportunity for those with an axe to grind to pick the conclusions which fit their preconceptions.