It only takes two minutes to fold laundry, if your doing a piss-poor job of folding. It’s also next a 15 second job loading, again unless you’re doing a piss-poor job of that too and not sorting your clothes before you wash them. Wash that cream jumper with the indigo jeans do you?
You're not taking into account people who don’t have a drier or can’t afford to use a tumble drier. Drying their clothes, particularly at this time of year, is so hard. Finding a space for it that isn’t in the way but somewhere close enough to a radiator to actually dry and not smell. Having just got a drier and a utility room, it’s infinitely easier to do laundry now there is a space for stuff to dry.
Laundry is relentless. Even when your washing basket is empty, you’re not on top of the laundry, you’re never on top of the laundry because you’re all wearing clothes, using towels to dry your hands, using a tea towel, using a cloth to wipe down the kitchen, sleeping in the made beds. But then you don’t have enough for a full load so then it sits there in the basket and you just think “how?” after you’ve done laundry all day.
If you cleaned your whole house and left for the weekend with your family, baring a storm or a fire, it would still be spotless when you returned. Even if you went away for two weeks, there would be a small amount of dust but your house would still be clean. If you go away for two weeks, you’ve got at least 4 loads of washing to do.