In my experience that is false, you could experience that with a breeder and a local pet store if you don't do your due diligence before/ after purchase. I always recommend taking a new petto the vet within 24hr of purchase. Make the appointment ahead of time so you don't have to wait. If you spend time watching them and checking their condition before purchasing ( chirping / dancing/ playing etc. I watch the birds for 30 minutes- hour before choosing one- I look for activity, clean eyes, nose, vent, feathers bright and in good condition, if they're interacting with their surroundings etc) and take it to a vet right after purchase you could have a pet for 7-10+ years ( with great care from you) .... My first parakeet came from Petco and he lived 15 years. My current parakeet is from Petco and will be 4 years old next March. His vet says he's perfectly healthy. We don't have. private/ non big pet stores here anymore.