Parents who are very negative about life and have a poor attitude do not help their children aspire. They teach their children, sometimes without even knowing it, to not have any dreams about their future. Maybe the parents had parents who were the same way, or they choose to be defeatists without even trying. Have seen this first hand.
On the other hand, parents who are optimistic about life and want great things for their children often have the right attitude and good communication skills to pass onto their children. They encourage their children and help them aspire in life.
In either situation, I hope the children realize they have to make an effort to make something of themselves if they want to get somewhere in life.