I didn't think she had brittle bone and very pleased you can feel safe giving her little hugs. So sorry your friend is so frail it takes a very dedicated person to care for those who are needing so much help, birds are simpler to assist. Hugs to you both and hope you find some help.
No failures here, we can only benefit from sharing knowledge so between you both and the rest of the flock we should have it covered. The endangered Puerto Rican Amazon seems to have come through very well both captive bred and wild populations surviving. Did better than many humans.