Why do Recumbents look so different?
Because they are different. Very different! Conventional bikes attempt to configure the body around the bike. Recumbents configure the bike around the body, laws of efficiency and aerodynamics. This is also why designs differ so much from recumbent to recumbent. Consider that the conventional bicycling position evolved from an 1800s contraption with a beam of wood, two carriage wheels, and a handlebar. This was called a “Draise”. This position really had nothing to do with efficiency or comfort.