That's a result of viscious relationships: media needs ad views, ad views are best harvested via outrage, and politicians need ongoing and widespread exposure.

That's a result of viscious relationships: media needs ad views, ad views are best harvested via outrage, and politicians need ongoing and widespread exposure. Subtlety and nuance just makes a politician vulnerable to outrage and doesn't itself easily generate views and exposure. Outrageous and definitive statements, and outrageous and damning accusations generate ad views and exposure. Politicians cannot afford to be complicated.