I watched a PBS show the other night about parrots, they had a lot of cockatoos, raised in captivity to sell to people as pets, omg... that was so sad, DH and I had tears in our eyes at the end of the show. There are thousands in rescue centers because people get rid of them because they can't stand the noise from their almost constant squawking or once mature they can get aggressive and attack or bite. Some of the birds get so traumatized they self mutilate themselves by plucking out all of their feathers. The people that take them in at the rescue centers were in tears at the huge number of birds that people asked them to take, some said if they couldn't take them they were going to take them to the SPCA and have them euthanized, but they had to turn them down because they have no more space.
My personal opinion is that no bird should have to live in a cage.