The environment changed them that's why they care less when a bread is thrown and become so human friendly so they don't have to run like their ancestors did when they see any human aside their owners.
Duck lives are easy, just say Quack Quack. Grazing and after that go have a shower or swim in the water. Easy life, wish human lives was as easy as this.
hopefully not all of them
and we should really watch it
we're destroying nature that way
as for your wish .. to some it is ;)