I'm sorry but I have to disagree on this one. I'm not overly fond of hybridizing any bird species, but it's the natural progression in captivity for people to start mixing and matching to get new mutations, colors, etc. For the common species, it's not really that big a deal. Selective breeding in birds has been going on for as long as birds have been kept in captivity. Macaws are the first ones which can be hybridized, so it's new grounds for birds. Since the hybrids aren't sterile, then the different species are very closely related, so it's unlikely for there to be any real health consequences long term for the hybrid birds. I've handled many hybrids, the only real negative I see is misproportioned beak/feet/toes in some of the mixes involving birds like Hyacinths or Greenwings and the smaller macaws, like Scarlets, but that's primarily cosmetic, though it can cause problems if left unattended (overgrown beak, toes, etc). However, with continued responsible breeding and monitoring, these problems will get ironed out in a few generations.
But, to me, hybridizing a highly endangered species dilutes the gene pool so that there's no chance of recovery. At the rate of destruction of their native habitat, captive breeding programs and zoos will likely be the only time you'll see a Hyacinth Macaw, Palm Cockatoo, etc. They do the same with the big cats and other animals, and I'm really not fond of it. Take the lyger and taigon craze - I believe it's the lygers (the larger of the two) who get so large due to a lack of a growth hormone inhibitor. The problem is they never stop growing and have constant health problems, often ending in the animal being put down. Rather than waste a valuable breeding endangered Tiger on making this man-made animal who can't even survive on it's own in captivity, the Tiger should be in a captive breeding program to help increase the number of tigers. There have been instances in the past where a species becomes so highly endangered in it's native habitat that a call goes out to zoos, private collections, and pet owners to donate their animals to a breeding program to save the species. That can't be done if a bird who breeds roughly once a year spends every breeding opportunity hybridizing and not producing viable pure offspring.
Ultimately, it all boils down to personal opinion. If you find me hypocritical, then so be it. I don't think I'm being hypocritical, as there are varying levels of hybridization and since I didn't say I accept or disagree with it 100% without condition, to disagree with an element of it is not hypocrisy. However, you're welcome to think what you like about me and the topic
Doesn't really bother me. It's a topic that is debated in bird keeping circles and there are many strong proponents of both hybridizing and not. Like all issues, there's a middle ground in there somewhere, it just has to be found.