Whenever a medical doctor questions the safety of vaccines, Big Pharma and Big Med go nuts. Here's an example:
And OMG, let's not let anyone "deny' that man-made climate change is about to kill us all. Here is one of the most lucid discussions of that debate which I have yet found:
Such debates are stifled when one side's funding is cut off, and/or when people start losing their jobs because they support one side or the other.
And this has more to do with the scientists themselves than someone like Donald Trump.