A bird lover will always put the birds' needs before her own desires while a bird enjoyer will not. Bird enjoyers might love their own birds but will never really sacrifice for them and don't really care much for all other birds (people who buy babies knowing there is an overpopulation problem are all bird enjoyers and not bird lovers). That's the basic difference.
Yes, rescues do have young birds - sheesh! I even ended up with babies every now and then because people who did not know enough thought that putting a male and female together and giving them a nest was enough (based on the stupid and very erroneous belief that 'nature will take its course' is all is needed for breeding). And, because they did not do things right, they ended up with dead or hurt babies (the father would peck them, the parents would not feed, the mother would throw the baby out of the nest, etc) and then they would panic, blame the birds for it and bring them to the rescue. I've hand-raised several babies because of this...
I do hope that this site will still be up in another five years! If it's not, I will have to look for another such place to post and that won't be easy...
I've never wanted to enlarge my flock and I've hardly ever chosen a bird, I always take in the ones that need it the most and the only birds I've actually gone out looking for are mates for lone ones because I would not have just a single bird, it's not kind to the bird. And even those I do not really choose, I just take the first one that needs a good home regardless of its age, condition, personality, etc. None of those things really make no never mind to me because I like them all.. the old, the mean, the ugly, the handicapped - it's all the same to me, I think they are all beautiful and lovable. Right now, I am looking for a male GCC or any other pyrrhura male and even a small arantinga for my female GCC which recently lost her mate because although I was planning on rehoming her to a couple who had adopted a male GCC from me years ago, they cannot take her (the lady has muscular dystrophy and has gotten worse as the years go by) and I do not want her to end up in a home that I don't know as she was rehomed by me in the past and I had to take her back because the people were not giving her the attention she needed. I also took two birds in recently even though I had said that I was not taking in any more - but I couldn't say no to the poor lady who owned them because she has stage IV breast cancer that has spread to her lymphatic system and, as a cancer survivor myself, I well know the worry of not knowing where my animals would end up when I did not know if I was going to make it or not.