I agree with everyone children have to learn to comfort themselves and not rely on us to do so. If they do not learn this it is going to be a rough time for them as they grow up and attend school.
A child will cry, as you said Playfelt, when they are mad or frustrated. I have noticed how parenting ideas have changed over the years. I believe parents are now feeling guilty for leaving their child at childcare and will do anything to make them happy. Some parents are trying so hard to be friends with their children and make sure that they like them, instead of setting boundaries they are spoiling them.