I think the point here isn't just that the CEO was performing a mundane task, but that he was doing work that had to get done, even though it wasn't a desirable task. There was a giant pile of dishes - he cleaned them. The dishes were the thing that needed to get done.
If he does it just once, I question his motives. This repeated behavior shows his true conviction.
If he does it just once, I question his motives. This repeated behavior shows his true conviction.