Yeah, washing one thing is simple, but a long sequences of things to wash is ensuring to think about... There are greasy things, crusted things, that all need different methods to wash. Also, it takes a long time for the water to become hot. Then drying...

But then, once the first thing has been washed, the water is already hot and soap is already partially washing the other greasy things! Might as well do a little bit more washing while we're at it. If i stop, i have to dry my hands and wipe the countertop...