Disgusting, isn't it? And it's not just cruelty towards parrots. People do it to their own kind. You might think, in the VERY least, people would favor their own species and treat it with respect, but no; humanity doesn't even have THAT going for it. It's across the board disrespect to and disregard of even the most basic PURPOSE of the things that humanity seeks to destroy. Hmm, at least there's no partiality! But that's not really a bragging point, rather an observation.
Don't let it completely kill your faith in humanity though. There's still good out there. After all, there're a lot of great parrot owners; you're going to have your nutjobs and ignorants in every aspect of life, in every institution, etc. Hard to see the good sometimes, but negativity does that. Gets it's big ugly head in front of everything actually worth noting...