They probably spent a year looking for a job and they're suffering from imposter syndrome so they feel like if they aren't constantly getting stuff done they might be fired, plus they haven't worked enough to hit burnout and don't know how to pace themselves.

Reminds me of the joke about the old bull and the young bull. Young bull says to the old bull "hey pops, let's run down into the valley and fuck one of those cows". Old bull says "I've got a better idea: let's walk down and fuck them all."