We all want to believe that this is true and will remain true after your death, but the reality is that it is often not the case. The death of a loved one is a very emotional, highly charged time in which words can easily get misconstrued and feelings hurt.
In cases where a child may have been a caregiver to an ailing parent, they may feel that they deserve more than an equal share of the estate, or there may be resentment if during your life you gave financial assistance to one sibling over another and now the other sibling feels they should get more from your estate. Having a Last Will and Testament prepared will give your family guidance as to whether you want to divide your estate equally or if you do in fact want to give differing percentages or make a charitable gift. Perhaps you have remarried and forgot to have a new deed prepared putting your residence into you and your spouse's name. If you want to ensure your spouse can continue to live in your shared residence until their passing, you will want that specified in a will.
There are a number of scenarios you may not have even considered that could cause a rift in the family after your death; having a will in place can often prevent such family disagreements.