Let me first say to you that your posts on this thread have been uniformly personal, sneering and pompous. My money in on your not having any expertise in this area, such as a doctorate in neurochemistry.
And then let me point out that you obviously did not read the link in my post about brain abnormalities caused by general anesthesia before the age of two. What part does bad parenting possibly have to play in that scenario? Should they have let the child die?
You are correct. Do you imagine anesthesia is the only cause of brain abnormalities? Do you have a doctorate in neurochemistry? What is your claim to expertise in this field?