You know people might need to get more than two loads of laundry done in a day. While one might not need to supervise the washing machine, you do need to be around to move the laundry to the dryer, so that you know, it drys. Where with a normal washer I could have the wash done in thirty minutes, throw it in the dryer, start ANOTHER load in the washer and then run into town to get some errands done, when I get home an hour later, oh looks. I have a load of dry laundry., and another load of laundry to put in the dryer. Meanwhile you are still waiting for your first load of laundry to wash and I'm getting load number three in the washer.
You'd be amazed at how much laundry two kids and two adults can produce in a week.
Given that I had laundry duty for the wife and three daughters, I know exactly how much laundry can be produced in a week. I also know that it's not unusual for the laundry to sit in the washing machine for three hours after it's run before I get around to moving it to the dryer.