I'd say cooking a meal typically takes me about an hour if I include cleanup and preparation -- and that's while owning a dishwasher while not factoring in time spent on making meal plans and changing plans because an important ingredient isn't available or just time spent buying ingredients because not everything is available in one place.
Every person that cooks often that I've talked to grossly underestimates how much time their cooking takes them.
The ones that are more efficient either have a ton of cooking experience and talent or just a great kitchen setup, which is a rare luxury and generally a large investment.