What bothers me about this post is that she basically tells Amy that she should be taken by the angel so she can be with Rory. She may have lost her parents but she didn't grow up with them. The doctor is devastated because not only did he lose Amy, even after he asks her not to go, but because River supported it. He lost the one person he felt he had and that hurt him. So don't say how she protected the doctor, she allowed for him to properly grieve for something she had come to accept.