If you start as a baby your body is too small and weak to get anything on your own, so the foundation of your life is actually built by the people taking care o

If you start as a baby your body is too small and weak to get anything on your own, so the foundation of your life is actually built by the people taking care of you. How could you customize being helpless to suit a later presumed lifestyle? I also struggle to see how all the content stored in an adult brain could be transferred to a smaller-sized baby brain, when the brain grows as your body matures.