It seems like babies simply cry for just any reason. I think part of that is a parent screaming "OMG" or "OH NO". When a baby hears their parent seem concerned then they have reason to be worried. When parents dont flip out in front of their babies the babies tend to not cry. A parents job is not to protect their child from life and all eventuality. Things are going to happen and many things that hurt a child SHOULD happen. That's right, I said it, there are BAD things that should happen. We are a system that learns from our mistakes. This is how God made our brain but if you remove mistakes because a parent swoops in to take care of the child the child's brain never learns the wrong. So it is important for every human to experience many different problems.