You can still hand raise birds, AND have them near their parents to learn how to be birds, it just takes a much longer time to be friendly with people if parent raised, and most people DONT handle baby birds straight after they’re weaned. Making them much more, aviary type birds instead of people birds. It kind of depends on the parents, if the parents are aviary birds, the baby’s will grow up with little contact with humans, hence being afraid of them. If the parents are indoor birds that get much attention, then the same SHOULD be the case for the baby’s, but that’s not always the case. So it can depend on the birds you have. Where you keep them, and how much time you spend with them.