1) you don’t need to wash the dishes before loading the machine. There is a filter you can clear food out of but most people don’t know about it. Scrape off the solids beforehand leads to less gunk in the filter.

2) a cycle will typically be much hotter for much longer than whatever you do manually. So the dishwasher is what I trust to fully disinfect my dishes

3) a family of four cooking at home will need a full load every day so it’s a lot more efficient than manually washing and drying everything, especially when both parents work