The child is ready to be ready to do things on their own? Whether it be potty training or breast feeding. Are you not the parent isnt that what your job is to teach them? Are you embarrassed when your friends or other people are chit chatting about potty training their kids at 18 months or 2 years old and your child is 4 and still isnt potty trained or even attempting to because "they arent ready"? What about when your child starts school, do you still believe in waiting until your child wants to write or learn the curriculum? Why is it different? That is why they have milestones for ages and what they SHOULD be doing. NOT TALKING ABOUT CHILDREN WITH DISABILITIES.