In democracy, as quaintly understood, voters pick their representatives. American democracy increasingly reverses that. Legislative districts are drawn to protect incumbents who, effectively, pick their voters.
Voters cannot hold officials responsible if they do not know what government is doing, or which parts of government are doing what.
Politics in a democracy is transactional: Politicians seek votes by promising to do things for voters, who seek promises in exchange for their votes.
Political ignorance helps explain Americans' perpetual disappointment with politicians generally, and presidents especially, to whom voters unrealistically attribute abilities to control events.