So we emotionally convince ourselves that we have solved the problem so we can act appropriately and continue doing things that are important to us.
The founders recognized this problem and attempted to setup a Republic as an answer to it; so that each voter didn't have to ask "do I know everything about everything so I can select the best person" and instead were asked "of this finite, smaller group, who do I think is best to represent me at the next level"? We've basically bypassed that; every voter knows who ran for President last election, hardly anyone can identify their party's local representative in the party itself (which is where candidates are selected, after all).