I have no ability to accurately determine whether or not one of five candidates actually knows what they are doing, or if they are just a hustler who knows how to play Buzzword Bingo. I suppose I could spend months of my life trying to get educated on the subject, but I don't have time to do so, and neither do my neighbors.
This is why representative democracies exist. You vote for a representative, and it becomes their job to wrangle domain-specific underlings.
[1] The only feedback signal I can trust is 'Did a one-in-a-thousand-year event occur under their watch?' [2]
[2] And if it did, well shucks, what am I going to do now? Fire them in the next election? The damage is already done.