It is significantly less productive to hand wash dishes. But that’s fine to do manually if you wish for something that takes up maybe half an hour of your own time every several days. It’s not fine if washing dishes is your job. No company is going to hire an artisanal dish hand washer that refuses to use a dishwasher.
I was taught to give them a quick rinse but let the dishwasher make them sparkly clean. This avoids clogging the dishwasher's pipes with excessive food waste. Certainly any piece of food you could pick up between your fingers must be scraped in the bin before going in the dishwasher (or before hand washing).
