If I didn't have a dishwasher, I personally think it's gross as well as unhygienic to wash all those dirty dishes in the same sink or pan full of water with food particles in it. On the other hand, individually washing a dish or glass with a sponge or washcloth is also something I wouldn't do, given that reports indicate they're breeding places for bacteria, unless I used a Scott towel or something which I could discard. So, if I didn't have access to a dishwasher, I'd do what my mother used to do, which is scrape off the biggest pieces of food, rinse off any actual food "stuck" to the dishes, and then wash them in a bowl of hot sudsy water, rinse them in hot water again and leave them to dry in a rack or towel dry with a fresh towel.
There's nothing, however, that gets bacteria off dishes and glasses like dishwashers, because of the really high temperatures.
People don't get how many of their colds, flues, intestinal flues etc. abdominal "issues", come from bacteria on their own hands and house surfaces, and from food. One of my doctor friends told me to wash my hands the first thing after I come into the house and to wash them multiple times a day, especially, of course, after the bathroom, and, use the dishwasher.
They are indeed energy guzzlers, however. Oh, she also says having a glass of wine with lunch and dinner is an excellent idea because the alcohol can kill any bacteria in the food.
News accounts always rave about how much modern medicine has done in terms of people's health. The vast majority of the gains are vaccines, antibiotics, and more and better hygiene.