I disagree. "They" no longer believe "dry and wonkish" can deliver.
Sure, there are plenty of voters who don't have the sense to pour piss out of a boot, but their existence is used as little more than a cliche to avoid the great mass of intelligent, insightful, concerned people who lack the "insider view" to make critical evaluation of the esoterica of government.
I would love to be proven wrong. But, Obama got into office twice. People like Schwarzenegger, Jesse Ventura & Al Franken win elections. And then there's Trump...