It’s not untrue that you can do this but what will happen to your estate if you have failed to write a Will?
Without a Will, if you have children, your spouse may not inherit all of your estate.
Unless you have made your Will. Your partner will get nothing! Your entire estate would pass to your children, or if you had none, be shared between your brothers, sisters and parents.
If you die without making a Will, your spouse will be entitled to claim part or all of your estate.
If your children are orphaned, you don’t give the authority of Guardianship and the power to choose who shall look after them, including allocating them to foster parents. Children will often go into the care of the Social Services while it is being established who is best to look after them.