I think the thinly-vailed condescension over people who use a dishwasher is what rubs me the wrong way, as though using a more energy and time-efficient method

I think the thinly-vailed condescension over people who use a dishwasher is what rubs me the wrong way, as though using a more energy and time-efficient method to avoid a monotonous unnecessary task is a vice, or that hand-washing dishes is somehow promoting social harmony (in a way that isn't substitutable with a less pointless activity).