why isn't it realistic to attempt to dodge birds? I've done it. I've also dodged thunderstorms, dust devils, toy balloons, other airplanes.
While it might be realistic in a small, slow airplane while flying with a good buffet margin, it is normally impractical in a large, fast airplane or when flying without a large maneuvering margin. When you "dodged" the birds, it is likely you would have missed them even without any action.