Legally Estate is defined as:
One’s property moveable and immovable, vested and contingent, especially as disposed of in a will.
No one knows what the future holds and so it is important that everyone has a plan. For the young married couple with children, it is crucial to have a will that designates guardians for those children in the event both parents are killed.
The bottom line is that estate planning is pervasive i.e. important for everyone.