Yes, those sorts of people get to appear on tv, but ...
The unfunded tax cuts were clearly the thing that upset the markets. They would doubtless have been less unhappy if there had been savage spending cuts (markets aren't there to be sympathetic). But there was a revenue shortfall baked in, and no one believed the growth narrative.
The two talking heads simply want to hold onto the idea that rightwing policies are market friendly in the face of the clear evidence that it ain't so.
God knows why we let these dogmatic types loose. But they do let off their chains now and again.