Powerwash simulator is occasionally fun. There's shiny rewards, I don't have to deal with potential bad weather, and there's no random patches that take 20 times to get rid of. If I don't feel like powerwashing simulator, it will wait for me, forever, with no ill consequences or social judgement.

If I never wash my actual driveway, the same is not true. Therefore I will need to wash it at times when it's unpleasant or I don't want to, and it will take longer than powerwashing a driveway in Powerwash simulator.